Volume up:
Raises volume
Multi-function button:
Press once to play/pause or answer/end a call
Press twice to track forward, press 3 times to track back
Press and hold to ignore an incoming call
Volume down:
Lowers volume
Volume up:
Raises volume
Multi-function button:
Press once to play/pause or answer/end a call
Press twice to track forward, press 3 times to track back
Press and hold to ignore an incoming call
Volume down:
Lowers volume