Sena Technologies 20S Helmet Clamp Kit For Honda Goldwing CB / Audio brings all of the sound of your onboard audio system right into your helmet The adapter cable with multi-pin DIN plug connects the onboard audio system with the helmet clamp and allows users to listen to the onboard audio system, including FM radio and GPS navigation The CB radio retains full functionality with the use of the integrated PTT switch/button and clamp kit microphone When paired up with a Sena 30K, 20S or 20S EVO main module, all sounds - CB radio, GPS navigation, and FM radio - from the onboard audio system can be mixed with Sena sound sources, including intercom, MP3 music, and phone