BTR4 - Water Resistant Rocker Switch Bluetooth Controller & Receiver 

Water-resistant Audio Controller and Receiver with Bluetooth® Wireless Technology

The BTR4 Bluetooth audio receiver is well suited for small watercraft, motorcycles, golf carts and utility vehicles. The BTR4 Bluetooth receiver can function as a stand-alone, wireless audio source unit or as an add-on audio controller and receiver. The backlit controls allow for easy operation.