Marine Audio Bluetooth Stereo Package w/ Boat Waterproof 4inch Speaker for Yacht. Tuner Section FM Stereo Frequency Area US, Europe. Bluetooth: long distance music Streaming. RMS Power Output: 4 x 45W. Power supply: DC 12V. Meets ASTM B117 salt/fog standard. Input Types: Bluetooth, USB, AUX. Outputs: 1 pair RCA Pre-Amp Out. Mounting Hole Diameter: 115mm(4.52). Mounting Depth: 35mm/(1.37). Frequency Response: 120Hz – 20kHz. Grill material: UV Plastic. Magnet Material: Ferrite, 4oz. Magnet Protection: Plastic Water Guard. Application:Boat, yacht, SPA, swimming pool, ATV, UTV. Connector: USB A-type port+23.5mm RCA audio Plugs + USB A-type male. High speed 2.0 USB Extension Lead. Cable Length: 0.5M (19.68 Inch). Connects devices that use USB Type A ports/RCA port. It’s compatible with both USB 1.1 (standard) and USB 2.0 (high-speed). Hello friend, we will send you the corresponding Audio Package according to your options. At the same time, if you are not satisfied with the current set of boxes, we also have different accessories and hosts for you to choose from. 2 Pair 4inch White Waterproof Speakers. 1 PCS USB Cable. Only one unit, excluding speakers and accessories(NW-307-US). Only one Speakers, excluding unit and accessories(NW-4001B-US). 1 Pair 4inch Black Waterproof Speakers. All items will be tested in advance before sending out. We will offer replacement without extra charger after we receive the defective item. Due to the recent lack of logistics transportation capacityOnly for orders ordered from Friday evening to Sunday, and logistics and transportation are normal from Monday to Thursday. GUZARE marine series of head units and remotes are fully tested against UV radiation degradation as well as tested to IP66 water intrusion standards. We also fully test the stereo units for every changing environmental conditions that you may experience on the boat or out in the dunes such as temperature extremes, as well as vibration testing to make sure they can take a bump and keep performing as a high standard product. If you are dissatisfied for any reason, please do not be quick to leave negative/neutral feedback. Our working time: Monday to Friday.