MTB-RX Waterproof BT receiver; Achieving amazing sound on the water has never been easier, thanks to our family of MediaMaster® source units. Specifically engineered for marine and powersports applications, each model is outfitted with a variety of tuner and connectivity options, plus multi-zone level controls, for maximum listening flexibility and convenience. Every MediaMaster® is NMEA 2000® Certified for direct integration with vessel networks, allowing control functionality from a variety of Marine Multi-Function Displays* (MFD). Both MM100s-BE and MM50 models feature weatherproof construction (IP66 rated) with oversized controls and customizable, full-color LCD displays. The MM80-HR Hidden Receiver is controlled by your compatible MFD or the MMR-40 Network Controller, while remaining tucked away within your vessel. If top-quality audio is your priority, a MediaMaster® belongs on your boat.