DS18 Waterproof Universal Bluetooth Streaming Audio Receiver w/Controller Microphone [BTRCRMIC]Waterproof Universal Bluetooth Streaming Audio Receiver w Controller & Microphone Take your marine audio experience to the next level with DS18s BTRCRMIC an audio streamer designed to provide crystal clear sound, no matter what the weather conditions may be! Featuring a CB radio style microphone with controls, the BTRCRMIC allows you to communicate through your audio system. The CB Radio Style Mic is plugged in via the included quick detach cable.