The 3M PELTOR Flexible Boom Speech Microphone, MT34/1, is for use on the 3M PELTOR WS LiteCom Pro III Headsets. The MT34/1 cable is intended to feed through the earcup, with a grommet to ensure a tight seal, and plugs directly to the PCB. The MT34/1 speech microphone is noise canceling and is water and dust proof for reliable performance in demanding conditions.