4Button.functionsButton FunctionOn/Off. Slide up or down to turn the headset on or off.TalkPress to make or answer a call.Press to end a call.In Idle mode, press and hold for about 5 seconds toactivate pairing mode.During a call, press and hold for about 2 seconds toactivate call waiting features.••••VolumePress [ ] button to adjust the volume up,press [ ] button to adjust the volume down.In Idle mode, press and hold [ ] button to reconnect if theheadset loses the connection to a paired music device.During a call, press and hold for about 2 seconds tomute the microphone.•••You can hear a beep when the volume level of the headset reaches to the Minimum orMaximum level.