Premium Marine Bluetooth 4.0 + Aptx Music Receiver - Exile Audio - Bluetooth v4.0 Compliant and AptX Codec Enabled - Installation Connect the RCA Connectors to the AUX input, +12V Power and ground required - Plug into an existing stereo with Aux-in and let the Bluetooth streaming begin - Water Resistant Construction, Engineered for the marine environment - 100ft+ Extended Streaming range