Quick reference guide - headset
VOLUME 
/+ -
Press the volume keys on the 
side of the headset to adjust the listening volume when on a call.
MUTE/FLASH
Press to mute the microphone during a call.
Press and hold to answer a call waiting call while on a call.
Press to mute the ring tone in the earpiece when there is an incoming call.
Battery cover
Open to install or replace the battery.
Earpiece
Microphone
