Sennheiser MB Pro1 Instruction Manual page 10

Product overview
Audio button: Volume adjustment
Function
Move
the
button
During an active call:
Increases/reduces the speaker volume
During music reproduction:
Increases/reduces the audio volume
In idle mode
(no active call or music reproduction):
Increases/reduces the volume for the ring tone, the beeps
and the voice prompts
Audio button: Mute function | Direction of the audio button's volume up/
down function | Room experience
Function
Press
the
button
During an active call:
Mutes/unmutes the headset's microphone
Changes the direction of the Audio button's volume up/
down function; MB Pro 2 also changes the left and the
2 s
right stereo channel
Activates/deactivates the room experience for enhanced
call comfort during calls (MB Pro 2 only)
6 s
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MB Pro1 | MB Pro 2 | 9