HV-589 Microphone Adapter Cables are used to convert a base microphone with an 8-pin round connector for use on a mobile transceiver that has an 8-pin modular mic input. Enjoy providing the enhanced audio on your transmissions without the mobile mic clicking noises and tinny sound. Especially if you use a ICOM VHF/UHF mobile transceiver as a base radio, use HV-589 Microphone Adapter Cables with your desk mic and transmit in style.