Marine Audio Package Bluetooth Stereo Amplifier System for Car Jet Ski Deck Boat. Host function display video. 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. Wateproof 6.5 Stereo Speakers. Speaker Size: 6.5. 1/2 PEI diaphragm tweeter. Shell size: 180 mm (7). Mounting Depth: 57.6 mm (2.26). Mounting Hole Diameter: 129 mm (5). Frequency Response: 120Hz – 20kHz. Voice Coil Impedance:4? Voice Coil Size:25mm. Voice Coil Material: ASV. Cone/Edge: PP cone/Rubber Edge. Resonant Freq(FO):85HZ + 20%Hz. Freq Response:85Hz-12 KHz. Marine Rubber Radio Antenna. Waterproof and resists corrosion. Perfect for boats and campers. 13.3inch Long Mast. 1 x Pcs Watertpeoof Stereo Player. 1 x Pair Waterproof Speakers. 1 x Pcs Waterproof IP66 Radio Antenna. 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.