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Mute/Un-mute
To mute the headset sound during a call, press the Volume Up button and the Volume Down button
for 2 seconds, and you hear 1 tones repeated every 20 seconds. Upon activating the mute function,
the person on the other side won’t hear you, but you can hear all sound generated from the other
side. To un-Mute, press the Volume Up button or the Volume Down button once.