MUSON MK2 User manual

Bluetooth 4.1 Transmitter and Receiver 2-in-1 Hands-free
Adapter
Specifications:
Bluetooth Version: 4.1
Frequency Range: 2.4GHz
Output Power Category: Class2
Bluetooth Mode: HFP/HSP/A2DP/AVRCP
Bluetooth Range: up to 30feet
Power Supply : Li-Po 170mAh
working Current: 22mA (MAX)
Charge Voltage: DC 5.0V
Product Diagram
1.Power ON/OFF;Pause/Play;Answer/Hang Up
2. Indicator Light

3.Next Song/Volume Up
4.Previous Song /Volume Down
5. Microphone
6.USB Charge
7.Receiver/Transmitter Switch
8.Pairing Switch
9. Audio Output/In
Power On
Long press the button ” ” about 3s ,it will power on automatically,the blue light will
flash in receive mode;green light will flash in transmit mode.
Power Off
Long press the button ” ” about 3s , it will power off automatically.
TX & RX
TX : Transmit mode,work as Bluetooth Transmitter
RX : Receive mode,work as Bluetooth Receiver
Please note:you need to wait for about 4s then shift to RX or TX when power it off
and want to choose another mode immediately.
Receive Mode
Receive Mode Setting
Make sure you turn the switch to the”RX” side before you power it on,then it will
work as receive mode automatically.
Instruction:
1. Connect the device to your headphone/Home Speakers or Car Stereo System with
3.5mm audio cable.
2. Pair the receiver to your phone.
3. Now you can enjoy your music through your Headphone,Speakers,Home Stereo
System/ Car Stereo System,or answer calls with hands free.
Pair to your phone:
1.For the first time using the device as a receiver,you should pair it to your mobile
phone.
2.After power it on, short press the button ” ”,it will be in the pairing state,blue
light flashing quickly.
3. Open the Bluetooth function of your phone.

4. Search for the Bluetooth device " Link-BT4838"and connect to it.
5 Enter the code "0000" if needed.
6. If pair successfully,the indicator will light blue constantly.
Connect Two Cellphone
1.Pair the Bluetooth receiver to the first phone.
2. After pair successfully,press the button ” ” and it will turn into pairing sate
automatically,the blue light will quickly flash few times.
3. Pair the Bluetooth receiver to the second phone.
4.Two phone will pair to it simultaneously.
Notice
The receiver will connect to the last connected phone automatically when it turns on.
(Please make sure enable the Bluetooth function of your phone before turn on the
receiver.)
In pairing mode
If you want to disconnect the paired phone and connect another phone, you can long
press the button ” ” about 3s ,it will turn into pairing mode,the blue light will flash
quickly.
Answering a call:
When there is a incoming call,short press the button ” ” to answer it.
When get through,long press ” ” for 1s you can choose to answer the call through
Bluetooth or phone.
If there is a second incoming call then you are speaking:
·Short press the button ” ”,hang up the first call and answer the new call.
·Double press the button ” ”,hang on the first call and answer the new call.
·Long press the button ” ” for about 1s,answer the first call and reject the new call.
Rejecting a call
Long Press the button ” ” for about 1s .
Ending a call

When you want to end a call ,short press the button ” ” or just hang up your phone.
Redialing the last called number
Double press the button ” ” to redial the last called number in your first phone;
Double the button ” ” to redial the last called number in your second phone.
Three-way Calling
Short press the button ” ”,hand up the answering call and switch to the another
call;
Long press the button ” ” to switch between the two calls.
Play Music
1.Play/Pause: Short press the button ” ”
2.Next Song: Short press the button” ”
3.Previous Song: Short press the button” ”
4.Volume Up: Long press the button” ”
5.Volume Down: Long press the button” ”
Voice assistant
Long press button "+" and "-" simultaneously for one second ,you can trigger
the "Voice Assistant" function of your cellphone ,repeat the procedure to clo
se the "Voice Assistant" function.
Transmit Mode
Transmit Mode Setting
Make sure you turn the switch to the”TX”side before you power it on,then it will
work as transmit mode automatically.
Pair to your Bluetooth Receiver :
1.Insert the 3.5mm audio cable from the Audio output Port of your media play
device (Smart Phone,iPad,MP3,CD/DVD player,TVs and more) to the Audio
Output/Input Port of this transmitter.
2.After power it on,short press the button ” ”,it will be in the pairing state,the
green light flashing quickly.
3.Turn on your Bluetooth receiver(Bluetooth speakers/Bluetooth headphone

etc.),make sure Bluetooth receiver is within 1 meter to this transmitter,it will pair
automatically.
5. If pair successfully,the indicator will stay on green.
6.Now you can enjoy music on your Bluetooth-enabled equipment from your media
play device!
Pair to Two Bluetooth Receiver
1.Pair to the first Bluetooth Receiver;
2.After pair successfully,Short press the button ” ”,it will turn into pairing state
automatically,the green light will quickly flash few times.
3.Power on the second receiver,they will pair automatically.The green light will stay
on.
4.Two receiver will pair to it simultaneously.
Notice
If successfully pair to the Bluetooth receiver for the first time,when you power on the
device next time, it will reconnect your receiver automatically.
In pairing mode
If you want to disconnect the paired phone and connect another phone, you can long
press the button ” ” about 3s ,it will turn into pairing mode,the green light will flash
quickly.
Play Music
1.Mute on/off: Short press the button ” ”
2.Volume Up: Long press the button” ”
3.Volume Down: Long press the button” ”
Low power warning
When the device is in low power state,it will alarm automatically, the red light
flashing quickly;it will power off automatically if the voltage is below 3.0V.
Charge the device
When the device is in low power state or lack of power, please charge it through USB
charge port with DC 5V power supply input,during charging the red indicator will stay
on.When finish charging,the red indicator will go off.
Please use the micro USB cable to charge the device.
Notes
1. Please charge it in time when in low battery or do not use it regularly,in case it
won't normally work or damage the battery.

2.Bluetooth signal can be blocked by surrounding objects and reduce the audio
quality,please put it in the right position without barrier between adapter and your
phone(or other devices).
3.If you can not pair to your device according to the user manual,please long press
the Pairing Switch for 8s till red light flash once after power on,then try to pair again.

FCC WARNING
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.
NOTE 1: Any changes or modifications to this unit not expressly approved by the party
responsible for compliance could void the user's authority to operate the equipment.