AG TWS04K User manual

T WS 04K
T WS 04K
Read before using this product

Is it broken? Troubleshooting Examples
Thank you very much for purchasing the TWS04K/TWS04K-WH.
In order to use this product properly, please be sure to confirm the following
User’s Manual.
If any of the problems listed under “Is it broken? Troubleshooting Examples”
below should occur while using this product, please confirm the causes and
remedies listed in “Troubleshooting: When you think “Is it broken?” on P.7-8
of the User’s Manual. There are cases in which the user can remedy the
problem by him or herself.
Additional Guide for Purchase Made from Amazon:
T WS 04K
T WS 04K
Description of contents found
on package
Q What should I do if I need help regarding the product?
A Kindly refer to the user manual or Q&A section of the Amazon product
page. Please post your question there if the answer you are looking for
is not available yet. You will be replied very soon.
Q What should I do if the product is not functioning well within 30
days from purchase?
A Try to perform a factory reset by referring to the user manual. If this
procedure does not help, you could make a request to return the
product to Amazon by visiting Returns & Orders after logging in to your
own account.
Q What should I do if the product is not working properly after 30
days from purchase?
A Try to perform a factory reset or perform the troubleshooting remedies
which can be found in the user manual. If you need further help, you can
reach us through Amazon by clicking on the Sold by: AG Direct on the
product page then send your inquiry after clicking the Ask a question
button. You will receive a reply soon.
Q This product is amazing! How can I share my experience to the others?
A We are very glad that you are happy with our product. By leaving a
review on Amazon, your experience and excitement would reach millions
of people around the world.
Q What should I do if I find the sealing sticker on the package opening
is broken on receipt?
A Kindly make a request to return the product to Amazon by visiting
Returns & Orders after logging in to your own account.
・Earphones will not turn ON.
・Earphones will not turn OFF.
・Earphones cannot be charged.
・Earphones cannot be detected/ paired.
・While playing music, sound (connection) is interrupted.
・Sound only comes out from one side.
・In case it takes time to charge.
・Battery consumption is fast for one side of the earphones only.
・Mobile battery is not functioning.
ii

About us
Features
Communication Format
Chipset
Frequency Response
Codecs Supported
Profiles Supported
Continuous Music Playback
Continuous Communication Time
Continuous Standby Time
Charging Time
Battery Capacity
Water Resistance Rating
Bluetooth® 5.0
Qualcomm® QCC3020
20Hz ~ 20kHz
SBC, AAC, Qualcomm® aptX™ audio
A2DP, AVRCP, HSP, HFP
aptX™ : 6 hr, SBC/AAC : 9 hr
(Maximum 180 hr with case)
4 hr
128 hr
Earphone : 2 hr / Case : 4 hr
Earphone : 45mAh / Case 2600mAh
IPX7
Specifications
High-quality sound designed by Japanese high-end
audio brand, final
The sound is tuned by the Japanese audio brand, final. By
suppressing the fatiguing sound commonly possessed by
Bluetooth, TWS04K delivers clear vocals with sufficient
bass.
Supreme highest sensation of fit
5 sizes of final newly designed [TYPE E Truly Wireless
Exclusive Edition] ear tips are included as accessories.
Lost earphone unit repurchase service
Due to technical limitation, this feature is currently limited
to Japan region only.
aptX™ with superb sound quality and stable
connectivity
In addition to SBC and AAC, TWS04K also supports aptX
™ which delivers superb sound quality with exceptional
connection stability. TWS04K is compatible with a wide
range of models such as iPhone and Android, through
simple and easy pairing.
Mobile battery function
The earphone charging case equipped with a large capacity
battery of 2600mAh also works as a mobile battery for the
other devices such as smart phone, music players and etc.
Up to 180 hours of music playback
Up to 9 hours of music playback on a single charge of
earphones. Together with the high capacity charging case
which provides 20 times of full earphone charging, music
playback is extended up to 180 hours.
IPX7 waterproof rating
Enhanced by IPX7 waterproof rating, TWS04K bring you
non-stop music even in the rain or during sports.
180H
ag is a brand established by final Inc. which also owns theJapanese
high-end audio brand, final.
The brand name ag is inspired by the old Japanese word ""arigatakimono""
which means one of a kind or appreciation.
By utilizing the experience and knowledge cultivated through contract
development and manufacturing for major brands, the core of ag is to
create exquisite products at affordable prices.
iv v

T WS 04K
T WS 04K
User's Manual
2
SS S M L LL
Ear tips
(final TYPE E for
truly wireless earphones)
USB Type-C
charging cable
Main units Charging case User’s manual
(warranty card included)
Package contents
LED Indicator
LED Indicator
USB Port
Microphone
Multifunction Button
(MFB)
Part name

3 4
0〜10%
10 〜90%
90% 〜 100%
Red
Yellow
Green
Power / ChargingPower / Charging
Charging the charging case:
Connect the accessory USB charging cable(C) connector to the USB port on the charging case
and connect the USB(A) connector to an electrical appliance or adapter with the same shape of
connector and the internal battery within the charging case will begin to charge. While charging,
the LED indicator light will flash in different color depending on the power level of the battery.
Battery Remaining
Green LED lights up
Refer to the table above
Orange LED turns off
Orange LED lights up
Charging
Charging completed
Charging the charging case Charging the earphones
Charging the earphones:
Insert the earphone units into the charging case and they will begin to charge.
When the power is OFF, press the MFB button once to switch the power ON.
Turning on the earphones
After charging, remove the earphones from the charging case and the power will automatically
switch ON. (When the LED indicator lights up in white for 1 second, the power is ON.)
Press and hold the MFB button for about 3 seconds until two types of beep sound emanate, and
the power will switch OFF.
When the charging case is adequately charged, returning the earphones to the charging case
will automatically switch the power OFF and charging will begin.
Turning off the earphones
The first time the earphones are used:
1. Remove the left and right earphones from the charging case, and they will automatically be in
pairing mode. (The LED indicator at left flashes between orange and white.)
2. Switch the Bluetooth function on the smartphone or other device ON and select [TWS04K_L]*1
once it appears on the display.
3. A [Bluetooth pairing request] from the other side earphone will appear on the display, please
select [pairing] or [OK]. (The display varies depending on the smartphone or other device to
which it is connected.) When the following appears on the display of the device being
connected, left/right pairing has been completed.
*1: In the case of TWS04K-WH, [TWS04K-WH_L] will be displayed.
To reestablish pairing or to perform pairing with a second or later device:
1. Remove the earphones from the charging case and the LED indicator will light up white for 1
second as the power automatically switches ON.
2. Press the MFB button twice on one side of the earphones to switch to pairing mode. (LED
indicator flashes between orange and white.)
3. Switch the Bluetooth function on the smartphone or other device ON, and select either
[TWS04K_L] or [TWS04K_R] *2 once it appears on the display.
4. A [Bluetooth Pairing Request] from the other side earphone will appear on the display, please
select [Pairing] or [OK]. (Varies depending on the smartphone or other device to which
it is being connected.) Left and right pairing has been completed when any of the messages
below have been displayed.
*2: In the case of TWS04K-WH, [TWS04K-WH_L] or [TWS04K-WH_R] will be displayed.
* Before performing pairing with a new device, please disconnect the device to which it has already
beenpaired or switch the Bluetooth function OFF on the deviceto whichit has already been paired.
* If Connected is displayed for
either side, pairing has succeeded.
* The side for which connected is
displayed is the parent earphone.
To connect to your smartphone or other device initially, it is necessary to perform pairing.
For devices which have already completed pairing, a connection will automatically be
established the next time the power is switched ON.
Performing device pairing
TWS04K_L
Setting
Device
TWS04K_L
TWS04K
TWS04K_R
Connected
Not connected
TWS04K-WH
Connected
Not connected
TWS04K-WH_L
TWS04K-WH_R

5 6
Points of Caution
·There is a risk of permanent hearing loss from extended use at excessive sound volumes.
Please do not exceed 40 hours use per week at a sound volume of 80 dB(A) or 5 hours per
week at a volume of 89 dB(A).
·To avoid electromagnetic interference, please refrain from use in places in which the use of
electronic devices is prohibited.
·If you are using a pacemaker or other electronic medical device, please consult your physician
before using this product.
·
This product contains small parts that may be hazardous to children, so please store in a place
that is out of the reach of children.
·Please do not subject to strong shocks or apply excessive force. Damage from abnormal use is
not covered by the warranty. To prevent damage, please store the earphones inside the case in
an appropriate location.
·Causing damage to the circuits may result in fire or electrical shock, so please do not attempt
to disassemble this product.
·Please keep this product away from water or other liquids that may cause shorts or other
damage.
·Please do not attempt to repair this product yourself as unauthorized attempts at repair may
void the product warranty.
·Never use earphones when operating a bicycle, automobile, motorcycle or other motor vehicle
as this is a cause of traffic accidents and there is a risk of serious consequences. Even when
not driving, please do not use at railroad crossings, traffic intersections and other environments
where there is a danger in the inability to hear surrounding sounds.
·This product may be damaged if it is placed in locations where the environment is subject to
excessive direct sunlight, humidity, dust and other contaminants.
·Always keep the charging terminals clean. Dirt and dust adhered to the metal charging points
of the earphones or the pins of the charging case might cause short-circuit, burn, or fire.
About the ear tips
When bass is difficult to hear and high range sound jars the ear, there is a possibility that the ear
tip fit is not appropriate. In order to enjoy music in accordance with the design of the earphone,
it is important that the ear tip fits properly and there is a means of sealing the ear canal. In order
to achieve the proper fit, please try the following method:
·Please try various sizes, not just M size.
·In case of small ears, please try not just S and SS size, conversely try larger sizes as well.
·
Even if the size of the ear canal is the same, the left and right ears may be different, so please
also try different sizes for left and right.
Mobile battery function
The charging case can perform as a mobile battery by connecting a compatible cable to its USB
(Type-C) port. To use it as a mobile battery, please first connect a compatible cable to the case,
and then connect the cable to the device which is to be charged.
*Please ensure that the order of cable connection to be correct before using this function. If the
connection order is incorrect, the device you want to charge might not be charged properly.
*Please check the orientation of the terminals before plugging in to avoid damage to the connector.
*There is the possibility that this function is not working on certain devices.
*The output is DC5V / 1A max. Please check in advance whether the connected device is
compatible.
*Only the cable for charging case charging is included. To use this function to charge other
devices, please prepare a compatible adapter or a compatible cable separately.
Factory reset method
When pairing could not be successfully completed, please perform earphone factory reset by
following the procedure below. Once the factory reset has been completed, please attempt
another pairing operation.
1. Insert the left and right earphones into an adequately charged charging case and press the
MFB button on both sides simultaneously for 10 or more seconds and the LED indicator will first
turn off, then light up in orange.
2. Next, remove the left and right earphone, and the LED indicator will flash white as pairing is
performed between the left and right earphones.
3. After a certain amount of time, the earphones will automatically switch to pairing mode with the
smartphone or other device. In this situation, the factory reset has been completed.
Music
Phone Calls
Siri/
Google Assistant
Playback
Pause
Next Track
Previous Track
Raise Sound Volume
Lower Sound Volume
Receive Call
End Call
Refuse Call
Initialize
Press Once
Press Once
Press Once
Press Once or insert into charging case
Press Twice
Press Twice (Parent earphone, only while music is stopped)*
* Depending on the device to which connected, this function may not be available.
Press until beep sound
emanates once, then release
Press until beep sound
emanates once, then release
Press Twice
Press Twice
Operation of the MFB button
To reestablish pairing or to perform pairing with a second or later device:
1. Remove the earphones from the charging case and the LED indicator will light up white for 1
second as the power automatically switches ON.
2. Press the MFB button twice on one side of the earphones to switch to pairing mode. (LED
indicator flashes between orange and white.)
3. Switch the Bluetooth function on the smartphone or other device ON, and select either
[TWS04K_L] or [TWS04K_R] *2 once it appears on the display.
4. A [Bluetooth Pairing Request] from the other side earphone will appear on the display, please
select [Pairing] or [OK]. (Varies depending on the smartphone or other device to which
it is being connected.) Left and right pairing has been completed when any of the messages
below have been displayed.
*2: In the case of TWS04K-WH, [TWS04K-WH_L] or [TWS04K-WH_R] will be displayed.
* Before performing pairing with a new device, please disconnect the device to which it has already
beenpaired or switch the Bluetooth function OFF on the deviceto whichit has already been paired.

8
Troubleshooting: When you think, “Is it broken?” Troubleshooting: When you think, “Is it broken?”
Earphone batteries
are depleted
MFB has not been
pressed for
adequate time
(Immediately after
purchasing)
Battery charge is low
Earphones will
not turn ON
Earphones will
not turn OFF
Problem RemedyCause
Please place the earphones in the charging case
and charge them. (In case the charge in the
charging case has run out, first charge the charging
case.) Please refer to “Power / Charging” on P.3
regarding the method for charging.
An error has occurred
due to improper
operation
In some cases, performing a reset operation may fix
the problem. Please refer to “Factory reset method”
on P.5. regarding the reset method.
MFB has not been
pressed for
adequate time
Please press the MFB button long enough for the
earphone to turn OFF. Please refer to “Turning off
the earphones” on P.4 regarding the method for
turning the earphones OFF.
Please press the MFB button long enough for the
earphone to turn ON. Please refer to “Turning on the
earphones” on P.3 regarding the method for turning
the earphones ON.
For safety of transportation from overseas, laws and
regulations do not allow the internal battery to be fully
charged at the time of shipping. For that reason, voltage
may fall below the level required for operation at the time
the customer opens the package. Fully charging the
battery before use may relieve this inconvenience.
Please refer to “Power / Charging” on P.3 regarding the
method for charging.
Has automatically
been connected to
a previously
connected device
Earphones
cannot be
detected/
paired
While playing
music, sound
(connection) is
interrupted
Problem RemedyCause
Please try performing the pairing operation again after
having deleted the pairing information from a
previously paired device.
Receives interference
from external factor,
and an impact
on the connection
status results
Bluetooth communicates using the 2.4GHz band.
This band is used by other wireless standards such
as Wi-Fi, etc., and so there is a possibility of
receiving interference. Moreover, this 2.4GHz band
does not penetrate liquids. There is impact from
humidity and rain, and the human body also
contains liquid, so there are individual differences in
connectivity. Furthermore, it depends on the
specifications of smart phones and other devices.
For that reason, switching OFF unused Wi-Fi/
Bluetooth settings on surrounding devices, etc. is a
countermeasure. While outside, there is a possibility
that moving a smartphone from inside a bag to a
breast pocket, etc. or otherwise reducing the
distance between devices may improve the
connection status.
Earphones are not
in the pairing mode
Earphones
cannot be
detected/ paired
In some cases, performing a reset operation may fix
the problem. Please refer to “Factory reset method”
on P.5. regarding the reset method.
Using ear tips other
than those included
as accessories
Metal contact on
earphone is not
touching the pins
on the charging case
Charging case
battery charge is low
Earphones
cannot be
charged
When ear tips other than those included as accessories
are used, there are cases in which they may interfere
with the charging case and make satisfactory
charging impossible. Please check to see whether
proper charging is possible using original ear tips.
Charging case
battery charge is low
In some cases, the battery remaining in the charging
case drops before you notice. After once charging
the charging case, place the earphones in the
charging case and check that the LED indicator
illuminates. Please refer to “Power / Charging” on P.3
regarding the method for charging.
Using ear tips other
than an accessory
When ear tips other than those included as accessories
are used, there are cases in which they may interfere
with the charging case and make satisfactory
charging impossible. Please check to see whether
proper charging is possible using original ear tips.
Please check that there is adequate contact
between the metal contacts and the pins on the
charging case.
In some cases, the battery remaining in the charging
case drops before you notice. After once charging
the charging case, place the earphones in the
charging case and check that the LED indicator
illuminates. Please refer to “Power / Charging” on P.3
regarding the method for charging.
The battery of one side
of the earphones
has depleted
The output of the USB
adapter being used
for charging is low
The left/right earphone
pairing has been
released
Sound only
comes out
from one side
In case it takes
time to charge
Battery
consumption
is fast for
one side of the
earphones only
Mobile battery
is not
functioning
Please place the earphones in an adequately charged
charging case and charge the earphones. Please refer
to “Power/ Charging” on P.3 regarding the method for
charging.
Based on the design
specification, one side
is the parent and the
other side is the child,
so the burden between
left and right is
different
Under the specification for Bluetooth earphones,
communication generally takes place with one side
as the parent and the other as the child.
As such, the child only communicates with the
parent, but the parent communicates with the
smartphone or other device and communicates with
the child as well, and so there is a difference in the
level of burden borne by the left and right earphone.
As a result, a difference in the battery consumption
between the left and right may occur.
In case you are using the USB port on a PC, etc.,
there are cases in which the output is low and it may
take more time to charge than the publicly listed value.
As such, please use a 5V/1A USB adapter when
charging this product.
In some cases, performing a reset operation may fix
the problem. Please refer to “Factory reset method”
on P.5. regarding the reset method.
The charging case can perform as a mobile battery by connecting a compatible cable to its USB
(Type-C) port. To use it as a mobile battery, please first connect a compatible cable to the case,
and then connect the cable to the device which is to be charged.
*Please ensure that the order of cable connection to be correct before using this function. If the
connection order is incorrect, the device you want to charge might not be charged properly.
*Please check the orientation of the terminals before plugging in to avoid damage to the connector.
*There is the possibility that this function is not working on certain devices.
*The output is DC5V / 1A max. Please check in advance whether the connected device is
compatible.
*Only the cable for charging case charging is included. To use this function to charge other
devices, please prepare a compatible adapter or a compatible cable separately.
Charging case
battery charge is low
In some cases, the battery remaining in the charging
case drops before you notice. After once charging
the charging case, place the earphones in the
charging case and check that the LED indicator
illuminates. Please refer to “Power / Charging” on P.3
regarding the method for charging.
The connection order
is incorrect
If the connection order is incorrect, the device you
want to charge might not be charged properly.
Please refer to "Mobile Battery Function" on P.5
regarding the correct connection order.
The direction of the
cable connection is
incorrect
Depending on the cable used, the device might start
charging by the charging case simply by
interchanging the side of the cable. Please attempt
to switch the connection side of the cable terminals.
Please refer to "Mobile Battery Function" on P.5.
7

9
10
Product Certification Information
Product : Bluetooth Earphone
Model number : AG-TWS04K
FCC ID:2AX2R-TWS04K
Changes or modifications not expressly approved by the party responsible for compliance could
void the user's authority to operate the equipment.
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
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.
Gently remove any build-up from the mesh filter with the tip of a toothpick. Please take care to
ensure that no foreign particles fall inside when doing so.
Maintenance
Warranty and after service
The warranty for this product is valid for 1 year from the date of purchase. During the warranty period,
we will repair the product based on the provisions below. The warranty is only valid in the country in
which the product was purchased. In the event that you need after sales service or support on the
purchased product, please contact the store you made the purchase from. If your purchase was made
from Amazon, kindly refer to the “Additional Guide for Purchase Made from Amazon” which can be
found on page ii of this manual.
1. During the warranty period, we will repair the product free of charge if the product failed even
though it was used in accordance with the instructions in the user's manual and the point of
caution sections.
2. In the following cases, repairs to the product will be subject to a fee even during the warranty period:
(1) The necessary documentation noted in the warranty card is not complete.
(2) The product is identified to be modified, disassembled, or repaired by a third party or customer
other than our company or our authorized organizations.
(3) The earphones were subjected to a strong impact or were allowed to get wet. Product failure
resulting from an excessive use of force on the product.
(4) Failure of the product or damage caused as a result of fire, earthquake, storm or flood damage,
lightning strike or other natural disaster.
(5) Repair of scratches on the surface of the housing or repair of the housing itself.
* There is a possibility of a change in the specification, so please scan this QR code
for the latest user’s manual.
Manufacturer:
final Inc.
3 -12 - 7 Kitakase, S ai wa i- ku, Kawa saki-shi,
Kanagawa 212 - 00 57, Japan
This card is necessary in the event that the warranty is utilized. Please store
this card along with a receipt or other documentation showing the date of purchase
in a safe place to be produced in the event that the warranty is utilized.
Please refer to the manual for the provisions of the warranty.
9
This manual suits for next models
1
Table of contents
Other AG Headphones manuals