ISOtunes Free User manual

ISOtunes Free
TWS Bluetooth Headset
User Manual
1）
2）Charging Base Indicator
3）Micro USB Charging Port
4）Indicator and Mic Hole
5）MFB
6）Charging Pogo Pin
7）Ear Tips
Charging Base Opening Snap
Headset (R)
Erect headset and place
them into the cochlea
Step②
Slightly rotate headset until it firm
Step③
Make the headset to cochlear edge tightly
USB charging port
Use the USB cable to connect with computer
Use the USB cable to connect with
mobile phone charger
Headset (L)
1
2
3
6
7
4
5
The red will flash according times
until the battery is up to the
corresponding level and will be
always on when it is fully charged,
Bluetooth headset should be used with the compatible devices
which support Bluetooth wireless technology. This allows you to
make two calls and enjoy the music streaming at any time freely.
Please read this user manual carefully before using the headset,
and also read your device’s user manual regarding the Bluetooth
function, and pay attention to those important safety and
maintenance information.
Please keep the headset away from children.
Specifications
*The time mentioned above may vary due to user's operation mode and
device settings.
Bluetooth Version：
Bluetooth Profiles Supported：
Audio Decoding Protocol：
Transmission Power：
Operation Range：
Frequency Range：
Battery of Headset：
Charging Voltage of Headset：
Charging Time of Headset：
Battery of Base：
Charging Voltage of Base：
Charging Time of Base：
Charging Headset Times from
Charging Base：
Music Playing Time：
Talk Time：
Standby Time：
Driver：
Driver sensitivity ：
Driver impedance：
Driver frequency ring range：
Dimensions of Charging
Base(mm)：
Dimensions of Headset(mm)：
Weight(one headset)：
Total Weight ：
V5.0
HFP, HSP, A2DP, AVRCP
SBC, AAC, APTX
Class 2
Up to 10 meters
2.4GHz-2.48GHz
45mAH Li-polymer Battery
5V±0.2V
About 1.5 hours
420mAH Li-polymer Battery
5V±0.2V
About 2hours
2-3 times
≥ 7.0 hours
≥ 7.0 hours
About 100 hours
φ6mm
90±3dB
16Ω±15％
20HZ-20kHz
L80×W33×H31
L26×W16.6×H24.8
About 4.6g
About 54g
Status No. Status Charging Base Performance
1
2
3
5
4
6
The indicator light of the headset flashes blue once every
5 seconds
The
headset(R)
Single Pairing
TWS Pairing Mode
Standby Mode
Call Mode
Headset Charging
Mode
7
The indicator light flashes red once every 20 seconds
Power Off State
Headset Mode
Charging Base Mode
When in a call, the indicator light of the headset flashes
red every 5 seconds
The indicator light of headset(R) flashes red and blue
alternately
After TWS pairing successful, the indicator light of right
headset alternately flashing red and blue, when the right
headset pairing successful with mobile phone, the
indicator light flashes blue once every 5 seconds
The indicator light flashes red for three times.
Low Voltage
Alarm State
Status No. Status Headset Performance
1Charging Mode of
the Charging Base
Identify according to L&R and
wear the headset (R) and
headset (L) respectively
8
The indicator light flashes blue for three times.
Power On State
Structure Sketch
Step①
Wearing Steps:
Charging Ways of Headset
The indicator light of headset is
red when being charged, and
will turn off automatically after
being fully charged
Put the headset (L) (R) to the corresponding position in the bottom
of the charging base.
Charging Ways of Charging
Base
Use the USB charging cable
to charge
Turning ON/OFF
Method
Pick up the headsets from the charging base to turn on automatically.
Put them back to power off and charge the headset.
Method
In OFF MODE, press and hold headset(R) or headset(L) MFB for
2 seconds to turn on.
In ON MODE, press and hold headset(R) or headset(L) MFB for
5 seconds to turn off.
The indicator light of the headset is red when being
charged, and will turn off automatically after being fully
charged
The indicator flashing red once every 5 seconds means
25% battery, twice means 50% ,3 times means 75% and 4
times means full battery(100%).
Charging Base
Baterry Indication
2
1.The indicator flashes red when being charged. The red
will flash according times until the battery is up to the
corresponding level.
2. No being charged or discharging to the earbuds, the
indicator is off
3.The indicator light is red when being fully charged
Check the charging device is suit to the headset or not.
Note 1:
Note 2:
Note 3:
Use only the supplied charger to charge the headset, if use
other device may violate the validation or the maintenance
article of this product and may cause danger.
Do not attempt to force open the built-in battery as this could
damage the headset.
Note 4:
Note 5:
Note 6:
A fully charged headset will lose its power automatically if left
unused. It is recommended to charge the headset each three
months.
Do not leave the headset in a too hot or too cold condition (best
between -10℃and 50℃) which may affect the headset's operations
although it is fully charged.
Do not dispose of the headset into fire or water.r.

ISOtunes Free
TWS Bluetooth Headset
User Manual
1）
2）Charging Base Indicator
3）Micro USB Charging Port
4）Indicator and Mic Hole
5）MFB
6）Charging Pogo Pin
7）Ear Tips
Charging Base Opening Snap
Headset (R)
Erect headset and place
them into the cochlea
Step②
Slightly rotate headset until it firm
Step③
Make the headset to cochlear edge tightly
USB charging port
Use the USB cable to connect with computer
Use the USB cable to connect with
mobile phone charger
Headset (L)
1
2
3
6
7
4
5
The red will flash according times
until the battery is up to the
corresponding level and will be
always on when it is fully charged,
Bluetooth headset should be used with the compatible devices
which support Bluetooth wireless technology. This allows you to
make two calls and enjoy the music streaming at any time freely.
Please read this user manual carefully before using the headset,
and also read your device’s user manual regarding the Bluetooth
function, and pay attention to those important safety and
maintenance information.
Please keep the headset away from children.
Specifications
*The time mentioned above may vary due to user's operation mode and
device settings.
Bluetooth Version：
Bluetooth Profiles Supported：
Audio Decoding Protocol：
Transmission Power：
Operation Range：
Frequency Range：
Battery of Headset：
Charging Voltage of Headset：
Charging Time of Headset：
Battery of Base：
Charging Voltage of Base：
Charging Time of Base：
Charging Headset Times from
Charging Base：
Music Playing Time：
Talk Time：
Standby Time：
Driver：
Driver sensitivity ：
Driver impedance：
Driver frequency ring range：
Dimensions of Charging
Base(mm)：
Dimensions of Headset(mm)：
Weight(one headset)：
Total Weight ：
V5.0
HFP, HSP, A2DP, AVRCP
SBC, AAC, APTX
Class 2
Up to 10 meters
2.4GHz-2.48GHz
45mAH Li-polymer Battery
5V±0.2V
About 1.5 hours
420mAH Li-polymer Battery
5V±0.2V
About 2hours
2-3 times
≥ 7.0 hours
≥ 7.0 hours
About 100 hours
φ6mm
90±3dB
16Ω±15％
20HZ-20kHz
L80×W33×H31
L26×W16.6×H24.8
About 4.6g
About 54g
Status No. Status Charging Base Performance
1
2
3
5
4
6
The indicator light of the headset flashes blue once every
5 seconds
The
headset(R)
Single Pairing
TWS Pairing Mode
Standby Mode
Call Mode
Headset Charging
Mode
7
The indicator light flashes red once every 20 seconds
Power Off State
Headset Mode
Charging Base Mode
When in a call, the indicator light of the headset flashes
red every 5 seconds
The indicator light of headset(R) flashes red and blue
alternately
After TWS pairing successful, the indicator light of right
headset alternately flashing red and blue, when the right
headset pairing successful with mobile phone, the
indicator light flashes blue once every 5 seconds
The indicator light flashes red for three times.
Low Voltage
Alarm State
Status No. Status Headset Performance
1Charging Mode of
the Charging Base
Identify according to L&R and
wear the headset (R) and
headset (L) respectively
8
The indicator light flashes blue for three times.
Power On State
Structure Sketch
Step①
Wearing Steps:
Charging Ways of Headset
The indicator light of headset is
red when being charged, and
will turn off automatically after
being fully charged
Put the headset (L) (R) to the corresponding position in the bottom
of the charging base.
Charging Ways of Charging
Base
Use the USB charging cable
to charge
Turning ON/OFF
Method
Pick up the headsets from the charging base to turn on automatically.
Put them back to power off and charge the headset.
Method
In OFF MODE, press and hold headset(R) or headset(L) MFB for
2 seconds to turn on.
In ON MODE, press and hold headset(R) or headset(L) MFB for
5 seconds to turn off.
The indicator light of the headset is red when being
charged, and will turn off automatically after being fully
charged
The indicator flashing red once every 5 seconds means
25% battery, twice means 50% ,3 times means 75% and 4
times means full battery(100%).
Charging Base
Baterry Indication
2
1.The indicator flashes red when being charged. The red
will flash according times until the battery is up to the
corresponding level.
2. No being charged or discharging to the earbuds, the
indicator is off
3.The indicator light is red when being fully charged
Check the charging device is suit to the headset or not.
Note 1:
Note 2:
Note 3:
Use only the supplied charger to charge the headset, if use
other device may violate the validation or the maintenance
article of this product and may cause danger.
Do not attempt to force open the built-in battery as this could
damage the headset.
Note 4:
Note 5:
Note 6:
A fully charged headset will lose its power automatically if left
unused. It is recommended to charge the headset each three
months.
Do not leave the headset in a too hot or too cold condition (best
between -10℃and 50℃) which may affect the headset's operations
although it is fully charged.
Do not dispose of the headset into fire or water.r.

ISOtunes Free
TWS Bluetooth Headset
User Manual
1）
2）Charging Base Indicator
3）Micro USB Charging Port
4）Indicator and Mic Hole
5）MFB
6）Charging Pogo Pin
7）Ear Tips
Charging Base Opening Snap
Headset (R)
Erect headset and place
them into the cochlea
Step②
Slightly rotate headset until it firm
Step③
Make the headset to cochlear edge tightly
USB charging port
Use the USB cable to connect with computer
Use the USB cable to connect with
mobile phone charger
Headset (L)
1
2
3
6
7
4
5
The red will flash according times
until the battery is up to the
corresponding level and will be
always on when it is fully charged,
Bluetooth headset should be used with the compatible devices
which support Bluetooth wireless technology. This allows you to
make two calls and enjoy the music streaming at any time freely.
Please read this user manual carefully before using the headset,
and also read your device’s user manual regarding the Bluetooth
function, and pay attention to those important safety and
maintenance information.
Please keep the headset away from children.
Specifications
*The time mentioned above may vary due to user's operation mode and
device settings.
Bluetooth Version：
Bluetooth Profiles Supported：
Audio Decoding Protocol：
Transmission Power：
Operation Range：
Frequency Range：
Battery of Headset：
Charging Voltage of Headset：
Charging Time of Headset：
Battery of Base：
Charging Voltage of Base：
Charging Time of Base：
Charging Headset Times from
Charging Base：
Music Playing Time：
Talk Time：
Standby Time：
Driver：
Driver sensitivity ：
Driver impedance：
Driver frequency ring range：
Dimensions of Charging
Base(mm)：
Dimensions of Headset(mm)：
Weight(one headset)：
Total Weight ：
V5.0
HFP, HSP, A2DP, AVRCP
SBC, AAC, APTX
Class 2
Up to 10 meters
2.4GHz-2.48GHz
45mAH Li-polymer Battery
5V±0.2V
About 1.5 hours
420mAH Li-polymer Battery
5V±0.2V
About 2hours
2-3 times
≥ 7.0 hours
≥ 7.0 hours
About 100 hours
φ6mm
90±3dB
16Ω±15％
20HZ-20kHz
L80×W33×H31
L26×W16.6×H24.8
About 4.6g
About 54g
Status No. Status Charging Base Performance
1
2
3
5
4
6
The indicator light of the headset flashes blue once every
5 seconds
The
headset(R)
Single Pairing
TWS Pairing Mode
Standby Mode
Call Mode
Headset Charging
Mode
7
The indicator light flashes red once every 20 seconds
Power Off State
Headset Mode
Charging Base Mode
When in a call, the indicator light of the headset flashes
red every 5 seconds
The indicator light of headset(R) flashes red and blue
alternately
After TWS pairing successful, the indicator light of right
headset alternately flashing red and blue, when the right
headset pairing successful with mobile phone, the
indicator light flashes blue once every 5 seconds
The indicator light flashes red for three times.
Low Voltage
Alarm State
Status No. Status Headset Performance
1Charging Mode of
the Charging Base
Identify according to L&R and
wear the headset (R) and
headset (L) respectively
8
The indicator light flashes blue for three times.
Power On State
Structure Sketch
Step①
Wearing Steps:
Charging Ways of Headset
The indicator light of headset is
red when being charged, and
will turn off automatically after
being fully charged
Put the headset (L) (R) to the corresponding position in the bottom
of the charging base.
Charging Ways of Charging
Base
Use the USB charging cable
to charge
Turning ON/OFF
Method
Pick up the headsets from the charging base to turn on automatically.
Put them back to power off and charge the headset.
Method
In OFF MODE, press and hold headset(R) or headset(L) MFB for
2 seconds to turn on.
In ON MODE, press and hold headset(R) or headset(L) MFB for
5 seconds to turn off.
The indicator light of the headset is red when being
charged, and will turn off automatically after being fully
charged
The indicator flashing red once every 5 seconds means
25% battery, twice means 50% ,3 times means 75% and 4
times means full battery(100%).
Charging Base
Baterry Indication
2
1.The indicator flashes red when being charged. The red
will flash according times until the battery is up to the
corresponding level.
2. No being charged or discharging to the earbuds, the
indicator is off
3.The indicator light is red when being fully charged
Check the charging device is suit to the headset or not.
Note 1:
Note 2:
Note 3:
Use only the supplied charger to charge the headset, if use
other device may violate the validation or the maintenance
article of this product and may cause danger.
Do not attempt to force open the built-in battery as this could
damage the headset.
Note 4:
Note 5:
Note 6:
A fully charged headset will lose its power automatically if left
unused. It is recommended to charge the headset each three
months.
Do not leave the headset in a too hot or too cold condition (best
between -10℃and 50℃) which may affect the headset's operations
although it is fully charged.
Do not dispose of the headset into fire or water.r.

ISOtunes Free
TWS Bluetooth Headset
User Manual
1）
2）Charging Base Indicator
3）Micro USB Charging Port
4）Indicator and Mic Hole
5）MFB
6）Charging Pogo Pin
7）Ear Tips
Charging Base Opening Snap
Headset (R)
Erect headset and place
them into the cochlea
Step②
Slightly rotate headset until it firm
Step③
Make the headset to cochlear edge tightly
USB charging port
Use the USB cable to connect with computer
Use the USB cable to connect with
mobile phone charger
Headset (L)
1
2
3
6
7
4
5
The red will flash according times
until the battery is up to the
corresponding level and will be
always on when it is fully charged,
Bluetooth headset should be used with the compatible devices
which support Bluetooth wireless technology. This allows you to
make two calls and enjoy the music streaming at any time freely.
Please read this user manual carefully before using the headset,
and also read your device’s user manual regarding the Bluetooth
function, and pay attention to those important safety and
maintenance information.
Please keep the headset away from children.
Specifications
*The time mentioned above may vary due to user's operation mode and
device settings.
Bluetooth Version：
Bluetooth Profiles Supported：
Audio Decoding Protocol：
Transmission Power：
Operation Range：
Frequency Range：
Battery of Headset：
Charging Voltage of Headset：
Charging Time of Headset：
Battery of Base：
Charging Voltage of Base：
Charging Time of Base：
Charging Headset Times from
Charging Base：
Music Playing Time：
Talk Time：
Standby Time：
Driver：
Driver sensitivity ：
Driver impedance：
Driver frequency ring range：
Dimensions of Charging
Base(mm)：
Dimensions of Headset(mm)：
Weight(one headset)：
Total Weight ：
V5.0
HFP, HSP, A2DP, AVRCP
SBC, AAC, APTX
Class 2
Up to 10 meters
2.4GHz-2.48GHz
45mAH Li-polymer Battery
5V±0.2V
About 1.5 hours
420mAH Li-polymer Battery
5V±0.2V
About 2hours
2-3 times
≥ 7.0 hours
≥ 7.0 hours
About 100 hours
φ6mm
90±3dB
16Ω±15％
20HZ-20kHz
L80×W33×H31
L26×W16.6×H24.8
About 4.6g
About 54g
Status No. Status Charging Base Performance
1
2
3
5
4
6
The indicator light of the headset flashes blue once every
5 seconds
The
headset(R)
Single Pairing
TWS Pairing Mode
Standby Mode
Call Mode
Headset Charging
Mode
7
The indicator light flashes red once every 20 seconds
Power Off State
Headset Mode
Charging Base Mode
When in a call, the indicator light of the headset flashes
red every 5 seconds
The indicator light of headset(R) flashes red and blue
alternately
After TWS pairing successful, the indicator light of right
headset alternately flashing red and blue, when the right
headset pairing successful with mobile phone, the
indicator light flashes blue once every 5 seconds
The indicator light flashes red for three times.
Low Voltage
Alarm State
Status No. Status Headset Performance
1Charging Mode of
the Charging Base
Identify according to L&R and
wear the headset (R) and
headset (L) respectively
8
The indicator light flashes blue for three times.
Power On State
Structure Sketch
Step①
Wearing Steps:
Charging Ways of Headset
The indicator light of headset is
red when being charged, and
will turn off automatically after
being fully charged
Put the headset (L) (R) to the corresponding position in the bottom
of the charging base.
Charging Ways of Charging
Base
Use the USB charging cable
to charge
Turning ON/OFF
Method
Pick up the headsets from the charging base to turn on automatically.
Put them back to power off and charge the headset.
Method
In OFF MODE, press and hold headset(R) or headset(L) MFB for
2 seconds to turn on.
In ON MODE, press and hold headset(R) or headset(L) MFB for
5 seconds to turn off.
The indicator light of the headset is red when being
charged, and will turn off automatically after being fully
charged
The indicator flashing red once every 5 seconds means
25% battery, twice means 50% ,3 times means 75% and 4
times means full battery(100%).
Charging Base
Baterry Indication
2
1.The indicator flashes red when being charged. The red
will flash according times until the battery is up to the
corresponding level.
2. No being charged or discharging to the earbuds, the
indicator is off
3.The indicator light is red when being fully charged
Check the charging device is suit to the headset or not.
Note 1:
Note 2:
Note 3:
Use only the supplied charger to charge the headset, if use
other device may violate the validation or the maintenance
article of this product and may cause danger.
Do not attempt to force open the built-in battery as this could
damage the headset.
Note 4:
Note 5:
Note 6:
A fully charged headset will lose its power automatically if left
unused. It is recommended to charge the headset each three
months.
Do not leave the headset in a too hot or too cold condition (best
between -10℃and 50℃) which may affect the headset's operations
although it is fully charged.
Do not dispose of the headset into fire or water.r.

2s
Bluetooth ON
Connect
ISOtunes Free-R
TWS Pairing
Pick up the two headsets from the charging base to power on and
waiting about few seconds , the two headsets will enter auto-pairing
mode. The two headsets connect with each other after few seconds,
the headset (R) alternately flashing red and blue, and then open the
phone's bluetooth device to search“ISOtunes Free-R”.
In OFF state, press MFB key for 2 seconds to power on and
waiting for few seconds , the two headsets will enter auto-pairing
mode. The two headsets connect with each other after few
seconds, the headset (R) alternately flashing red and blue, and
then open the phone's bluetooth device to search “ISOtunes
Free-R”.
Answer /End a Call
When call incoming, short press MFB of headset (R) or headset (L)
to answer the call；In call mode, short press MFB of headset (R)
or headset (L) to end the call when you hear “Call End” .
Reject a call
Press and hold MFB of headset(R) or
headset(L) for 2 seconds to reject the call, the
speaker prompts “Doo, Call Reject”.
On standby mode or music playing state, short
press the MFB of headset(L). (This function only
supports phone with voice dialing function)
Two-call Handling
Voice Dialing
When you are answering a call, there is another call coming :
(Only support the mobile phone which has the function of handling two
phones.)
Long press and hold MFB for 2 seconds to end the current call and
answer the incoming call;
Short press MFB to hold the current call and answer the incoming call;
After the second implementation, short press MFB to switch between two
calls;
After the second implementation, long press MFB for 2 seconds to end the
current call, and short press MFB to end the other call.
Music Pause/Playing
In standby mode, shortly press MFB of
headset(R) to play music.
On music playing state, shortly press MFB of
headset(R) to PAUSE music.
Volume +/-
Forward/Backward
In call mode or music playing mode, double click MFB of
headset(R) to volume up; double click MFB of headset(L ) to
volume down, once “Doo” can be heard from headset R/L when
volume is up to maximum or minimum.
In music playing mode, long press MFB of headset(R) for 2
seconds to next song; long press MFB of headset(L)for 2 seconds
to previous song.
Delete Pairing Records on the Headset
In OFF mode, press MFB of headset(R) or headset(L) for 10
seconds(OFF MODE→On Mode (2 seconds)→Delete Pairing
Records (10 seconds) until hearing “Doo” 3 times and indictors
flash red and blue twice at the same time.
Maintenance
Do not use abrasive cleaning solvents to clean the headset.
Do not allow the headset to touch with any sharp objects as this will cause
scratching and damages.
Please keep headset away from high-temperature, humidity and dust.
•
•
•
Note: When the first time to pairing or after delete the pairing
records, the headsets should be paired under 20cm unobstructed.
Operate as the above ways: 1 or 2 ,
It prompts “
Pairing successful ” after TWS paired successfully:
After TWS connection, the headset (R) enters the pairing mode
with the phone and prompts "pairing" .
Cell phone begins to search for bluetooth
devices (see the user guide of your phone
instructions), and select “ISOtunes Free-R”
from bluetooth device list.the right headset
prompts”Pairing successful”. the left and
right headset prompts :”dengdong”,and
the right headset prompts”Connected”.
After the right headset paired with mobile
phone successfully, the mobile phone will
have a Bluetooth pairing request (iphone
must be connected to the Bluetooth
interface on the mobile phone), select the
match, and the left headset prompts
“paring successful”. Unpairing headset(L)
can’t use master and slave function.
Trouble Shooting
Trouble Reasons Solutions
Can not turn on low battery protection Charging headsets for 1-2 hours
Turning off
automatically Low battery Charging headset for 1-2 hours
Headset echo Volume is too loud or
environment is noisy
Adjust the volume at phone
change a place
Noise in call
Wrong pairing Pairing again
Too many pairing records Delete pairing records
Charging base without
indicator light when
charging
DC power supply doesn’t
output power
Check whether the micro USB
charging
not line is plugged well or
Headsets without
indicator light when
charging
Can not turn on by picking
up the headset /No indicator
light when headset being
charged
Charging base low battery
protection
Charging both the headsets and
charging base for 1-2 hours
The two headsets TWS
pairing failure/TWS paired
successful but can not find
the headset(R)
No sounds after
pairing
Low voice of the calling
party Wearing headset is wrong Adjusting wearing position of
headset
The headsets couldn’t being
charged in charging base
1)Checking headset charging interface
whether has touched to POGO PIN of
charging base and the location is
correct or not.
2)Charging for charging base
Environmental interference
caused or distance between
headset and mobile is too far
Change a place or move the
headset close to the mobile
phone
Note: When the headsets TWS pairing failures, double press the
headset R and headset L to enter TWS pairing, then pair with
phone.
Master-slave switching
The master and slave headset are automatically paired after
being turned on. The right headset is defautt as master headset.
When the master headset is placed in the charging box, the slave
headset will automatically connect to the mobile phone and can
be used continuously.
When the left headset is turn on first and reconnected with mobile
phone , the left headset is the master headset; the right headset is
the slave headset.
Note: Single connection instructions: TWS and mobile pairing
records are required for single use.
TWS Reconnected
Press MFB of headset(R) or headset(L) for 2 seconds to power
on wait for few seconds, the two headsets connect automatically,
the headset pairs with the mobile phone that has ever paired after
few seconds reconnected successfully.
Pick up the headsets from charging base to power on wait for few
seconds, the two headsets connect automatically the headset
pairs with the mobile phone that has ever paired after few seconds
,reconnected successfully.
Method2:
Method1:
Note: the right and left headset will prompt“Dengdong” after TWS
reconnected successfully, the right headset prompts“ connected”
after reconnected with mobile phone successfully.
Note:All the above operations have to respect the preconditionsupported
Bluetooth hands free profile V1.5 and Phones areholding function (Network
services) from telecom.
NOTE: This equipment has been tested and found to comply with the limits for a
Class B digital device, pursuant to part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates uses and can radiate radio
frequency energy and, if not installed and used in accordance with the
instructions,
may cause harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If this
equipment does cause harmful interference to radio or television reception, which
can be determined by turning the equipment off and on, the user is encouraged
to
try to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
-Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
-Consult the dealer or an experienced radio/TV technician for help
Changes or modifications not expressly approved by the party responsible for
compliance
could void the user's authority to operate the equipment.
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following
two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that
may
cause undesired operation.

2s
Bluetooth ON
Connect
ISOtunes Free-R
TWS Pairing
Pick up the two headsets from the charging base to power on and
waiting about few seconds , the two headsets will enter auto-pairing
mode. The two headsets connect with each other after few seconds,
the headset (R) alternately flashing red and blue, and then open the
phone's bluetooth device to search“ISOtunes Free-R”.
In OFF state, press MFB key for 2 seconds to power on and
waiting for few seconds , the two headsets will enter auto-pairing
mode. The two headsets connect with each other after few
seconds, the headset (R) alternately flashing red and blue, and
then open the phone's bluetooth device to search “ISOtunes
Free-R”.
Answer /End a Call
When call incoming, short press MFB of headset (R) or headset (L)
to answer the call；In call mode, short press MFB of headset (R)
or headset (L) to end the call when you hear “Call End” .
Reject a call
Press and hold MFB of headset(R) or
headset(L) for 2 seconds to reject the call, the
speaker prompts “Doo, Call Reject”.
On standby mode or music playing state, short
press the MFB of headset(L). (This function only
supports phone with voice dialing function)
Two-call Handling
Voice Dialing
When you are answering a call, there is another call coming :
(Only support the mobile phone which has the function of handling two
phones.)
Long press and hold MFB for 2 seconds to end the current call and
answer the incoming call;
Short press MFB to hold the current call and answer the incoming call;
After the second implementation, short press MFB to switch between two
calls;
After the second implementation, long press MFB for 2 seconds to end the
current call, and short press MFB to end the other call.
Music Pause/Playing
In standby mode, shortly press MFB of
headset(R) to play music.
On music playing state, shortly press MFB of
headset(R) to PAUSE music.
Volume +/-
Forward/Backward
In call mode or music playing mode, double click MFB of
headset(R) to volume up; double click MFB of headset(L ) to
volume down, once “Doo” can be heard from headset R/L when
volume is up to maximum or minimum.
In music playing mode, long press MFB of headset(R) for 2
seconds to next song; long press MFB of headset(L)for 2 seconds
to previous song.
Delete Pairing Records on the Headset
In OFF mode, press MFB of headset(R) or headset(L) for 10
seconds(OFF MODE→On Mode (2 seconds)→Delete Pairing
Records (10 seconds) until hearing “Doo” 3 times and indictors
flash red and blue twice at the same time.
Maintenance
Do not use abrasive cleaning solvents to clean the headset.
Do not allow the headset to touch with any sharp objects as this will cause
scratching and damages.
Please keep headset away from high-temperature, humidity and dust.
•
•
•
Note: When the first time to pairing or after delete the pairing
records, the headsets should be paired under 20cm unobstructed.
Operate as the above ways: 1 or 2 ,
It prompts “
Pairing successful ” after TWS paired successfully:
After TWS connection, the headset (R) enters the pairing mode
with the phone and prompts "pairing" .
Cell phone begins to search for bluetooth
devices (see the user guide of your phone
instructions), and select “ISOtunes Free-R”
from bluetooth device list.the right headset
prompts”Pairing successful”. the left and
right headset prompts :”dengdong”,and
the right headset prompts”Connected”.
After the right headset paired with mobile
phone successfully, the mobile phone will
have a Bluetooth pairing request (iphone
must be connected to the Bluetooth
interface on the mobile phone), select the
match, and the left headset prompts
“paring successful”. Unpairing headset(L)
can’t use master and slave function.
Trouble Shooting
Trouble Reasons Solutions
Can not turn on low battery protection Charging headsets for 1-2 hours
Turning off
automatically Low battery Charging headset for 1-2 hours
Headset echo Volume is too loud or
environment is noisy
Adjust the volume at phone
change a place
Noise in call
Wrong pairing Pairing again
Too many pairing records Delete pairing records
Charging base without
indicator light when
charging
DC power supply doesn’t
output power
Check whether the micro USB
charging
not line is plugged well or
Headsets without
indicator light when
charging
Can not turn on by picking
up the headset /No indicator
light when headset being
charged
Charging base low battery
protection
Charging both the headsets and
charging base for 1-2 hours
The two headsets TWS
pairing failure/TWS paired
successful but can not find
the headset(R)
No sounds after
pairing
Low voice of the calling
party Wearing headset is wrong Adjusting wearing position of
headset
The headsets couldn’t being
charged in charging base
1)Checking headset charging interface
whether has touched to POGO PIN of
charging base and the location is
correct or not.
2)Charging for charging base
Environmental interference
caused or distance between
headset and mobile is too far
Change a place or move the
headset close to the mobile
phone
Note: When the headsets TWS pairing failures, double press the
headset R and headset L to enter TWS pairing, then pair with
phone.
Master-slave switching
The master and slave headset are automatically paired after
being turned on. The right headset is defautt as master headset.
When the master headset is placed in the charging box, the slave
headset will automatically connect to the mobile phone and can
be used continuously.
When the left headset is turn on first and reconnected with mobile
phone , the left headset is the master headset; the right headset is
the slave headset.
Note: Single connection instructions: TWS and mobile pairing
records are required for single use.
TWS Reconnected
Press MFB of headset(R) or headset(L) for 2 seconds to power
on wait for few seconds, the two headsets connect automatically,
the headset pairs with the mobile phone that has ever paired after
few seconds reconnected successfully.
Pick up the headsets from charging base to power on wait for few
seconds, the two headsets connect automatically the headset
pairs with the mobile phone that has ever paired after few seconds
,reconnected successfully.
Method2:
Method1:
Note: the right and left headset will prompt“Dengdong” after TWS
reconnected successfully, the right headset prompts“ connected”
after reconnected with mobile phone successfully.
Note:All the above operations have to respect the preconditionsupported
Bluetooth hands free profile V1.5 and Phones areholding function (Network
services) from telecom.
NOTE: This equipment has been tested and found to comply with the limits for a
Class B digital device, pursuant to part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates uses and can radiate radio
frequency energy and, if not installed and used in accordance with the
instructions,
may cause harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If this
equipment does cause harmful interference to radio or television reception, which
can be determined by turning the equipment off and on, the user is encouraged
to
try to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
-Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
-Consult the dealer or an experienced radio/TV technician for help
Changes or modifications not expressly approved by the party responsible for
compliance
could void the user's authority to operate the equipment.
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following
two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that
may
cause undesired operation.

2s
Bluetooth ON
Connect
ISOtunes Free-R
TWS Pairing
Pick up the two headsets from the charging base to power on and
waiting about few seconds , the two headsets will enter auto-pairing
mode. The two headsets connect with each other after few seconds,
the headset (R) alternately flashing red and blue, and then open the
phone's bluetooth device to search“ISOtunes Free-R”.
In OFF state, press MFB key for 2 seconds to power on and
waiting for few seconds , the two headsets will enter auto-pairing
mode. The two headsets connect with each other after few
seconds, the headset (R) alternately flashing red and blue, and
then open the phone's bluetooth device to search “ISOtunes
Free-R”.
Answer /End a Call
When call incoming, short press MFB of headset (R) or headset (L)
to answer the call；In call mode, short press MFB of headset (R)
or headset (L) to end the call when you hear “Call End” .
Reject a call
Press and hold MFB of headset(R) or
headset(L) for 2 seconds to reject the call, the
speaker prompts “Doo, Call Reject”.
On standby mode or music playing state, short
press the MFB of headset(L). (This function only
supports phone with voice dialing function)
Two-call Handling
Voice Dialing
When you are answering a call, there is another call coming :
(Only support the mobile phone which has the function of handling two
phones.)
Long press and hold MFB for 2 seconds to end the current call and
answer the incoming call;
Short press MFB to hold the current call and answer the incoming call;
After the second implementation, short press MFB to switch between two
calls;
After the second implementation, long press MFB for 2 seconds to end the
current call, and short press MFB to end the other call.
Music Pause/Playing
In standby mode, shortly press MFB of
headset(R) to play music.
On music playing state, shortly press MFB of
headset(R) to PAUSE music.
Volume +/-
Forward/Backward
In call mode or music playing mode, double click MFB of
headset(R) to volume up; double click MFB of headset(L ) to
volume down, once “Doo” can be heard from headset R/L when
volume is up to maximum or minimum.
In music playing mode, long press MFB of headset(R) for 2
seconds to next song; long press MFB of headset(L)for 2 seconds
to previous song.
Delete Pairing Records on the Headset
In OFF mode, press MFB of headset(R) or headset(L) for 10
seconds(OFF MODE→On Mode (2 seconds)→Delete Pairing
Records (10 seconds) until hearing “Doo” 3 times and indictors
flash red and blue twice at the same time.
Maintenance
Do not use abrasive cleaning solvents to clean the headset.
Do not allow the headset to touch with any sharp objects as this will cause
scratching and damages.
Please keep headset away from high-temperature, humidity and dust.
•
•
•
Note: When the first time to pairing or after delete the pairing
records, the headsets should be paired under 20cm unobstructed.
Operate as the above ways: 1 or 2 ,
It prompts “
Pairing successful ” after TWS paired successfully:
After TWS connection, the headset (R) enters the pairing mode
with the phone and prompts "pairing" .
Cell phone begins to search for bluetooth
devices (see the user guide of your phone
instructions), and select “ISOtunes Free-R”
from bluetooth device list.the right headset
prompts”Pairing successful”. the left and
right headset prompts :”dengdong”,and
the right headset prompts”Connected”.
After the right headset paired with mobile
phone successfully, the mobile phone will
have a Bluetooth pairing request (iphone
must be connected to the Bluetooth
interface on the mobile phone), select the
match, and the left headset prompts
“paring successful”. Unpairing headset(L)
can’t use master and slave function.
Trouble Shooting
Trouble Reasons Solutions
Can not turn on low battery protection Charging headsets for 1-2 hours
Turning off
automatically Low battery Charging headset for 1-2 hours
Headset echo Volume is too loud or
environment is noisy
Adjust the volume at phone
change a place
Noise in call
Wrong pairing Pairing again
Too many pairing records Delete pairing records
Charging base without
indicator light when
charging
DC power supply doesn’t
output power
Check whether the micro USB
charging
not line is plugged well or
Headsets without
indicator light when
charging
Can not turn on by picking
up the headset /No indicator
light when headset being
charged
Charging base low battery
protection
Charging both the headsets and
charging base for 1-2 hours
The two headsets TWS
pairing failure/TWS paired
successful but can not find
the headset(R)
No sounds after
pairing
Low voice of the calling
party Wearing headset is wrong Adjusting wearing position of
headset
The headsets couldn’t being
charged in charging base
1)Checking headset charging interface
whether has touched to POGO PIN of
charging base and the location is
correct or not.
2)Charging for charging base
Environmental interference
caused or distance between
headset and mobile is too far
Change a place or move the
headset close to the mobile
phone
Note: When the headsets TWS pairing failures, double press the
headset R and headset L to enter TWS pairing, then pair with
phone.
Master-slave switching
The master and slave headset are automatically paired after
being turned on. The right headset is defautt as master headset.
When the master headset is placed in the charging box, the slave
headset will automatically connect to the mobile phone and can
be used continuously.
When the left headset is turn on first and reconnected with mobile
phone , the left headset is the master headset; the right headset is
the slave headset.
Note: Single connection instructions: TWS and mobile pairing
records are required for single use.
TWS Reconnected
Press MFB of headset(R) or headset(L) for 2 seconds to power
on wait for few seconds, the two headsets connect automatically,
the headset pairs with the mobile phone that has ever paired after
few seconds reconnected successfully.
Pick up the headsets from charging base to power on wait for few
seconds, the two headsets connect automatically the headset
pairs with the mobile phone that has ever paired after few seconds
,reconnected successfully.
Method2:
Method1:
Note: the right and left headset will prompt“Dengdong” after TWS
reconnected successfully, the right headset prompts“ connected”
after reconnected with mobile phone successfully.
Note:All the above operations have to respect the preconditionsupported
Bluetooth hands free profile V1.5 and Phones areholding function (Network
services) from telecom.
NOTE: This equipment has been tested and found to comply with the limits for a
Class B digital device, pursuant to part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates uses and can radiate radio
frequency energy and, if not installed and used in accordance with the
instructions,
may cause harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If this
equipment does cause harmful interference to radio or television reception, which
can be determined by turning the equipment off and on, the user is encouraged
to
try to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
-Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
-Consult the dealer or an experienced radio/TV technician for help
Changes or modifications not expressly approved by the party responsible for
compliance
could void the user's authority to operate the equipment.
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following
two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that
may
cause undesired operation.

2s
Bluetooth ON
Connect
ISOtunes Free-R
TWS Pairing
Pick up the two headsets from the charging base to power on and
waiting about few seconds , the two headsets will enter auto-pairing
mode. The two headsets connect with each other after few seconds,
the headset (R) alternately flashing red and blue, and then open the
phone's bluetooth device to search“ISOtunes Free-R”.
In OFF state, press MFB key for 2 seconds to power on and
waiting for few seconds , the two headsets will enter auto-pairing
mode. The two headsets connect with each other after few
seconds, the headset (R) alternately flashing red and blue, and
then open the phone's bluetooth device to search “ISOtunes
Free-R”.
Answer /End a Call
When call incoming, short press MFB of headset (R) or headset (L)
to answer the call；In call mode, short press MFB of headset (R)
or headset (L) to end the call when you hear “Call End” .
Reject a call
Press and hold MFB of headset(R) or
headset(L) for 2 seconds to reject the call, the
speaker prompts “Doo, Call Reject”.
On standby mode or music playing state, short
press the MFB of headset(L). (This function only
supports phone with voice dialing function)
Two-call Handling
Voice Dialing
When you are answering a call, there is another call coming :
(Only support the mobile phone which has the function of handling two
phones.)
Long press and hold MFB for 2 seconds to end the current call and
answer the incoming call;
Short press MFB to hold the current call and answer the incoming call;
After the second implementation, short press MFB to switch between two
calls;
After the second implementation, long press MFB for 2 seconds to end the
current call, and short press MFB to end the other call.
Music Pause/Playing
In standby mode, shortly press MFB of
headset(R) to play music.
On music playing state, shortly press MFB of
headset(R) to PAUSE music.
Volume +/-
Forward/Backward
In call mode or music playing mode, double click MFB of
headset(R) to volume up; double click MFB of headset(L ) to
volume down, once “Doo” can be heard from headset R/L when
volume is up to maximum or minimum.
In music playing mode, long press MFB of headset(R) for 2
seconds to next song; long press MFB of headset(L)for 2 seconds
to previous song.
Delete Pairing Records on the Headset
In OFF mode, press MFB of headset(R) or headset(L) for 10
seconds(OFF MODE→On Mode (2 seconds)→Delete Pairing
Records (10 seconds) until hearing “Doo” 3 times and indictors
flash red and blue twice at the same time.
Maintenance
Do not use abrasive cleaning solvents to clean the headset.
Do not allow the headset to touch with any sharp objects as this will cause
scratching and damages.
Please keep headset away from high-temperature, humidity and dust.
•
•
•
Note: When the first time to pairing or after delete the pairing
records, the headsets should be paired under 20cm unobstructed.
Operate as the above ways: 1 or 2 ,
It prompts “
Pairing successful ” after TWS paired successfully:
After TWS connection, the headset (R) enters the pairing mode
with the phone and prompts "pairing" .
Cell phone begins to search for bluetooth
devices (see the user guide of your phone
instructions), and select “ISOtunes Free-R”
from bluetooth device list.the right headset
prompts”Pairing successful”. the left and
right headset prompts :”dengdong”,and
the right headset prompts”Connected”.
After the right headset paired with mobile
phone successfully, the mobile phone will
have a Bluetooth pairing request (iphone
must be connected to the Bluetooth
interface on the mobile phone), select the
match, and the left headset prompts
“paring successful”. Unpairing headset(L)
can’t use master and slave function.
Trouble Shooting
Trouble Reasons Solutions
Can not turn on low battery protection Charging headsets for 1-2 hours
Turning off
automatically Low battery Charging headset for 1-2 hours
Headset echo Volume is too loud or
environment is noisy
Adjust the volume at phone
change a place
Noise in call
Wrong pairing Pairing again
Too many pairing records Delete pairing records
Charging base without
indicator light when
charging
DC power supply doesn’t
output power
Check whether the micro USB
charging
not line is plugged well or
Headsets without
indicator light when
charging
Can not turn on by picking
up the headset /No indicator
light when headset being
charged
Charging base low battery
protection
Charging both the headsets and
charging base for 1-2 hours
The two headsets TWS
pairing failure/TWS paired
successful but can not find
the headset(R)
No sounds after
pairing
Low voice of the calling
party Wearing headset is wrong Adjusting wearing position of
headset
The headsets couldn’t being
charged in charging base
1)Checking headset charging interface
whether has touched to POGO PIN of
charging base and the location is
correct or not.
2)Charging for charging base
Environmental interference
caused or distance between
headset and mobile is too far
Change a place or move the
headset close to the mobile
phone
Note: When the headsets TWS pairing failures, double press the
headset R and headset L to enter TWS pairing, then pair with
phone.
Master-slave switching
The master and slave headset are automatically paired after
being turned on. The right headset is defautt as master headset.
When the master headset is placed in the charging box, the slave
headset will automatically connect to the mobile phone and can
be used continuously.
When the left headset is turn on first and reconnected with mobile
phone , the left headset is the master headset; the right headset is
the slave headset.
Note: Single connection instructions: TWS and mobile pairing
records are required for single use.
TWS Reconnected
Press MFB of headset(R) or headset(L) for 2 seconds to power
on wait for few seconds, the two headsets connect automatically,
the headset pairs with the mobile phone that has ever paired after
few seconds reconnected successfully.
Pick up the headsets from charging base to power on wait for few
seconds, the two headsets connect automatically the headset
pairs with the mobile phone that has ever paired after few seconds
,reconnected successfully.
Method2:
Method1:
Note: the right and left headset will prompt“Dengdong” after TWS
reconnected successfully, the right headset prompts“ connected”
after reconnected with mobile phone successfully.
Note:All the above operations have to respect the preconditionsupported
Bluetooth hands free profile V1.5 and Phones areholding function (Network
services) from telecom.
NOTE: This equipment has been tested and found to comply with the limits for a
Class B digital device, pursuant to part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates uses and can radiate radio
frequency energy and, if not installed and used in accordance with the
instructions,
may cause harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If this
equipment does cause harmful interference to radio or television reception, which
can be determined by turning the equipment off and on, the user is encouraged
to
try to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
-Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
-Consult the dealer or an experienced radio/TV technician for help
Changes or modifications not expressly approved by the party responsible for
compliance
could void the user's authority to operate the equipment.
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following
two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that
may
cause undesired operation.