Sennheiser MB 660 Instruction Manual page 27

Making calls via the MB 660
26 | MB 660
While on a call, you can mute or unmute the microphone using these swipes.
Gesture Function
Smart Pause is a feature that enables the headset to respond to gestures.
These gestures include taking the headset off to put a call on hold and
putting it back on to resume the call.
By factory default, Smart Pause is inactive. For the headset to respond
to these gestures, ensure that Smart Pause is activated in CapTune.
Some smartphones or softphones may not support this feature.
Gesture
Mutes the microphone
Unmutes the microphone
Function
Accepts a call
Resumes a hold call
Puts the call on hold
HOLD
Rejects an incoming call
and holds the active call
1
2
HOLD
Voice prompt
"Mute on"
"Mute off"