MusicMan TWS Bluetooth BT-X39 Manual De Utilización página 18

How to use device functions
Make a call: to make a call, use your phone in the normal way when
the headphone is connected to your phone. The sound will be
transmitted to the headphone automatically.
Answer a call: when there is incoming call, press the answer/end
key of the left headphone, or use the phone keys to answer the call.
End a call: after finishing the call, press the answer/end key of the
left headphone, or use the phone keys to end the call.
Reject a call: when there is an incoming call, press and hold the
answer/end key of the left headphone for 3 seconds until you can
hear "call rejected".
Re-dial the last dialed phone number: you can double click the
answer/end key of the left headphone to re-dial the last dialed
number and hear "redialing".
Play/Pause music: short press answer/end button to play or pause
music. The headphone cannot play music by itself. If you want to
hear music via the headphone, you have to start the music track on
your Bluetooth device (e.g. Smartphone).
Headphone status
In idle state after paired
In coming call
Low battery
Charging
Power on
Power off
TWS pairing
Bluetooth pairing
LED Indication
Blue light flashes 1 time every 7 sec.
Blue light flashes twice every 2 sec.
Red light flashes
Red light is on
Blue light flashes 3 times
Red light flashes 3 times
Blue and red light flash alternatively
Blue and red light flash alternatively