Q7: How to use the call function?
A: Once the headphone is connected with the smartphone via BT,
Press the MFB button once to receive incoming calls.
To hang up on a call, press the MFB once again.
To reject an incoming call, press and hold the MFB button for a few seconds.
Q8: What is the charging voltage?
A: Connect Type C cable to the headphone and connect the other end of the cable to a 5V DC adapter.