Q: Does the headphone have a call function?
A: Yes. Once paired to a mobile phone, The calls can be attended, rejected and ended using the media control buttons of the headphone.
Single press the middle button to receive an incoming call and hang-up on a call.
Press and hold the middle button to reject an incoming call.
Q: What is the charging voltage for charging the earphones?
A: You can use DC 5V adapter to charge your earphone.