Navigation remote control and wireless VHF
HM-157B/SW Icom

The COMMANDMICII™ provides 2nd station capability to talk and listen to other station(s), control most of the radio settings and use as an intercom between the radio and COMMANDMICII™.
*IC-M422, M504,: 2nd station only. / IC-M604: Two units can be attached.
Up to 60ft remote extension

The COMMANDMICII™ comes with a 20ft (6.1m) extension cable and up to 2 optional extension cables, OPC-999 (20ft; 6.1m), can be attached for 60ft (18.3m) remote extension.
Remote power On/Off, PA and Rx speaker functions

When used with the IC-M422, the public address, Rx speaker and remote power on functions are available. The remote power on function allows you to turn on or off the IC-M422 from the COMMANDMICII™.