Muting microphones: While in a call, select the Menu button. Select the Mute/Unmute button until Mute is displayed. The call screen displays a Mute icon in the lower right corner. Audio from the rider and passenger microphones will not be sent over the phone.

Unmuting microphones: Press the Mute/Unmute button until Unmute is displayed. The Mute icon is removed and the microphones resume normally.

Muting inbound audio: Use the volume hand control switch to adjust incoming audio to minimum volume. The POWER/MUTE button does not mute incoming phone audio.