By adding an optional CommandMic II® (HM-157), nearly every function of the M422, M504, and M604 radios can be controlled from remote locations, such as from the deck or flybridge. The CommandMic II fits in your palm comfortably and with the sizable LCD, allows you to control most functions of the main unit except DSC operation and Hail and Fog Horn functions. You can talk with the main unit as an intercom.
• Slim design is easy to hold and use
• Large LCD readout
• Remote On/Off, PA (public address), and RX (PA broadcast of incoming signal)
• IPX7 waterproof construction (protected against immersion; 30 minutes at 1meter depth)
• Comes with 20 ft. attached cable