The M-70 uses a directional condenser microphone capsule which is specially tuned to the frequency response to create clear and crisp audio in transmission. The PTT uses three pneumatic cylinders similar to the YAESU M-1 microphone to provide durable, solid and smooth operation. A simple one-touch PTT key lock button is located just above the PTT key to allow for long duration transmissions.

The Yaesu MMB-98 front panel mounting bracket is designed especially for mounting Yaesu Transceiver Front Panels such as the FTM-350E or FTM-400XD/D