The Icom OPC1541 Cable is 20 feet long and can be used to extend the cable attached to a Icom CommandMic. Allowing for a flexible, long-distance installation between the radio body and the microphone, featuring durable, waterproof construction the OPC-1541 is compatible with: HM-195 and HM-195G and various Icom marine radios including M400, M423, M424, M506, M510, and M605 series.