It is possible to change the direction of the volume control toggle switch to accommodate wearing the headset on either side of the head.
When the headset is not in use (i.e. no active call or music reproduction), press in and hold the volume switch for two seconds. The user will hear a cue 'beep' in the headset, and after releasing the switch, the announcement "Swap volume keys" should be heard in the headset.
Should voice prompting be disabled on the MB Pro, a second 'beep' will be heard instead of the prompt.
Note: When the direction of the volume control switch is changed on an MB Pro 2, the headset's left and right stereo channel is also changed to provide optimum stereo sound.