Heil AD-1-K headset adapter for Kenwood 8-pin. Heil sound headset adapter cables are used to interface your heil headset to your favourite transceiver. AD-1 series cables are required for Heil boom microphone headset models. All heil headset adapter cables use commercial-grade microphone connectors with dual-exit cable clamps. If you have several brands of transceivers, individual adapter cables may be connected to each radio, so you may quickly and easily move your heil boom microphone headset from one transceiver to another.