Plantronics BackBeat 903 User Manual page 11

Headphones Phone Controls and Indicators
Low battery indicator
Mute/unmute the call
(call in progress)
Adjust the call volume
(call in progress)
WarNiNG Do not use headphones at high volumes for an extended period of time. Doing so can
cause hearing loss. Always listen at moderate levels. See
more information on headphones and hearing.
Redial
Voice dialing (trying to
initiate call)
Action
None
Press in the volume/
tracking/mute button.
Tap the volume/tracking/mute
button forward (+) or backward (-).
Double tap on control button
2 second press on call
control button
Indicator Light Tone
3 red flashes every 3 high tones every
10 seconds 10 seconds
None Low and high tone to
mute, then a single low
tone every minute. High
and low tone to unmute.
None Brief low tone (2 low
tones when volume limit
is reached)
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None Double low tone
None Single low tone
for
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