Truly kEight User manual

USER MANUAL
ANC TWS Wireless earphone
K8

Product Parameters：
Product model K8 ANC Wireless earphone
version V5.0+EDR
Talk time about 4 hours
Music time about 4 hours
Headphone tip language English
Transmission distance ≥10m
Headphone charging time about 1 hours
Charging time of charging box about 2 hours
Single headphone weight 3.7g
Total weight 34.5g
Headphone battery capacity 40mAH
Charging box battery capacity 300mAH
Battery type Polymer lithium battery
Guarantee 1 Year

Charging:
Horn
Charging
Type-c charging port
Switch/ multi-
function touch
key
microphone
LED indicator
Charging box battery indicator position
Left and right
ear marks

(1) Charge the headset. The charging box has a built-in
battery. When the charging box has enough power, put
the headset in the charging box to charge the headset.
When the headset is in the charging state, the red light is
always on; when the headset is fully charged, the red light
turns green Lamp, the green light is always on for 10
seconds and then goes out.
(2) Charging the charging box. When the charging box
is too low or out of power, connect the Type-c charging
port to charge; when the charging box is in the charging
state, the red light is always on; when the charging is
saturated, the green light is always on.
wearing method:
State LED indicator
Earphone
Charging Red light always on
Full of electricity Lights up in green and goes off after 10 seconds
Charging box
Charging Red light always on
Full of electricity green light is always on

Please select the earplugs from different sizes provided
by us (the earphones are worn with medium size
earplugs, and the accessories contain a pair of large and
small earplugs) to select the earplugs that are most
suitable for you to get the best sound quality.
Note: When earphones are paired, the main and
auxiliary ears are randomly distinguished.
Boot method:
(1) Automatically turn on. Pick up two earphones from
the charging box to display a green light, and they will
automatically turn on. (There is a boot tone)
(2) Manual boot. When the earphone is not in the
charging box and it is turned off, you can manually turn it
on; press and hold the two earphone switches for about
2 seconds at the same time, and then the green light will
appear, and then let go.
Shutdown method:
(1) Put the earphone into the charging box (when the
charging box is charged), the earphone indicates the red
light is always on, the earphone is charging, and it is
turned off at this time;

(2) Press and hold the two earphone switch keys at the
same time for about 5 seconds, and the red light will be
on for 1 second to turn off the earphones;
(3) After turning on or disconnecting the Bluetooth
connection, if there is no operation, it will automatically
shut down after about 3 minutes;
Switch between primary and secondary headsets:
①In the process of using the opposite ear, the main ear
is turned off, and the auxiliary ear will automatically switch
to the main ear (and continue to maintain the music state
before switching);
②In the process of using the pair of ears, the auxiliary ear
is turned off, which will not affect the normal operation of
the main ear;
③When the left or right ear is turned on, the mobile
phone can be connected back.
Pairing mode:
Turn on the two earphones (with the power-on prompt
sound), and the two earphones will be automatically
paired (with the pairing prompt sound) after about 5

seconds. After the pairing is successful, the red and green
lights flash alternately for the primary ear, and the green
light flashes slowly for the secondary ear; then turn it on
again For mobile phone Bluetooth devices, search for the
pairing name "K8", and click Connect to use the pairing
mode. (After the connection is successful and in the
working state, the two headsets do not light up)
Single ear mode:
Turn on one of the headsets (with a power-on prompt
tone), the red and green lights flash alternately after
about 5 seconds, then turn on the Bluetooth device of the
mobile phone, search for the pairing name "K8", and click
Connect to use the monaural mode. (After the connection
is successful and in the working state, the two headsets
do not light up)
(In the single ear mode, the operation method of the
right ear shall prevail)
Noise reduction switch:
Long press the left ear or right ear switch button for about
1 second, and when you hear a beep, it will switch to:
noise reduction mode, off mode (normal mode),
transparent mode, and the three modes switch each other

(with a switching prompt tone); After connecting the IOS
system mobile phone, there is no shutdown mode, this
requires the IOS system mobile phone settings to restore.
Music playback pause / cut songs (up and down songs)
/ volume increase and decrease (IOS system mobile
phone volume adjustment synchronization)
(1) Play / pause.
When the headset is in the pairing state, after connecting
with the mobile phone, select the APP playback software
you need to start, then click the left ear or right ear switch
button to start playing music; click the left ear or right ear
switch button again to pause the music playback . (In
single ear mode, operate in the same way)
(2) Cut songs (up and down songs).
When the headset is in the pairing state, after connecting
with the mobile phone, in the process of playing music, at
this time double-click the left ear switch button, the music
can switch to the previous song; double-click the right ear
switch button, the music can switch to the next song.
(3) Volume addition and subtraction.
When the headset is in the pairing state, after connecting
with the mobile phone, in the process of playing

music/calls, at this time, triple-click the left ear switch
button to decrease the volume, and triple-click the right
ear switch button to increase the volume. (When the
volume is increased to the maximum, there will be a
"beep-beep" tone)
Incoming call answer / hang up / reject / three-way call
/ voice assistant / restore factory settings
When the headset is in the pairing state, after connecting
with the mobile phone, when there is an incoming call,
there will be a ringtone reminder of the incoming call.
(1) Answer incoming calls.
Click the left ear or right ear switch button to answer the
call. (In single ear mode, operate in the same way)
(2) Hang up the phone.
During the conversation with the other party, if you want
to end the call, click the left or right ear switch button to
hang up the call. (In single ear mode, operate in the same
way)
(3) Reject the call.
Press and hold the left ear or right ear switch button for

1 second and then let go to reject the call from the other
party. (In single ear mode, just operate in the same way)
(4) Three-way call.
①If there is a new call during a call, click the left or right
ear switch button to hang up the current call and answer
the new call;
②If there is a new call, press and hold the left ear or right
ear switch button for 1 second to keep the current call ,
Answer the new call;
③In a three-way call, press and hold the left ear or right
ear switch for 1 second to keep the current call, switch to
the held call, and switch between the two calls. (This
feature requires mobile phone support)
(5) Voice assistant.
When the headset is successfully paired and connected to
the mobile phone, four-click the left ear or right ear switch
key to open the voice assistant, and click the left ear or
right ear switch key again to close the voice assistant.
(6) Restore factory settings.
In the normal pairing mode, five-click the left ear and
right ear button to clear the historical pairing information.
After the pairing information is cleared, the headset will

automatically shut down.
Other functional tests:
(1) Turn on and connect back.
After power on, the headset will automatically connect
back to the paired mobile phone;
(2) Over-distance back connection.
After the headset and the mobile phone are disconnected
beyond a certain distance, they will return to the working
area within 2 minutes, and the mobile phone can be
automatically reconnected;
(3) Over distance does not connect back.
After the headset is disconnected from the mobile phone
for more than 2 minutes, it will not reconnect, and the
headset will automatically shut down;
(4) Disconnect over distance.
The headset and the mobile phone will be disconnected
if they exceed a certain distance; the main ear and the
secondary ear will be disconnected if the distance
exceeds a certain distance;
(5) Reconnect state.
The TWS connection status lasts for 20 seconds, and the
Bluetooth connection status of the mobile phone lasts for
30 seconds. If the connection is not successful, it will enter

the pairing state;
(6) Simultaneous display.
Synchronous display of the battery level of the Android
system headset; synchronous display of the volume
adjustment of the IOS system mobile phone;
(7) Charge reset.
When the headset is placed in the charging box for
charging, the headset will return to its original state
before being turned on;
(8) Low power prompt.
When the headset battery voltage is lower than 3.3V,
there will be a low battery warning tone every 30 seconds;
(9) Low power shutdown.
When the headset battery voltage is lower than 3.2V (the
headset power is less than 10%), the headset will
automatically shut down;
(10) Charging voltage of the charging box.
5V/300mAh (the charging box can be used to charge the
headset more than 3 times);
Safety precautions:
This product contains a built-in battery. It is not advisable
to expose the product to strong sunlight or near fire

sources. Do not place the device in an environment that
is too high (above 50 degrees Celsius) or too low (below
-15 degrees Celsius). Because this will cause serious
damage to the equipment.
Operation exception handling method:
(1) There is no sound in a certain earphone due to
improper operation or long-time shielding of the
earphone signal. Please try to move to the range where
the signal can be received to restore normal.
(2) For failures caused by unknown causes, turn off the
headset and then turn it on again.
(3) If you change a single product or misuse it, causing
the left and right earphones to be disconnected, pair the
left and right earphones again.
(4) If there is no sound when listening to music after the
headset is connected to the mobile phone, please go to
the Bluetooth settings of the mobile phone and find the
name of the connected headset (K8). When the
connection is displayed, click the headset name again.
(5) If the two earphones have been paired and connected
to the mobile phone, there is no sound from the earphone
after answering the call. You need to check the audio

output of the mobile phone and select the Bluetooth
pairing name (K8) corresponding to the earphone before
proceeding. Bluetooth call.
Thank you for using this product, I wish you a happy life.