Command Mic II - Full-function remote Mic - For IC-M422, IC-M504, and IC-M604 (2006 and later)
By adding an optional COMMANDMIC®, nearly every function of the Icom radios except for DSC control and hailer control on the M504, M604, and the M422 can be controlled from remote locations.

The COMMANDMIC® fits in the palm of your hand comfortably, and with the sizable LCD screen, allows you to control most functions of the main unit. You can talk with the main unit as an intercom.

Includes 20' of attached extension cable. With the M604, you may be able to plug in up to two COMMANDMIC's.