Marine Bluetooth Stereo Receiver Boat Audio Car MP3 Player Waterproof IP66 Guage Audio System. For Boat, Yacht, Motorcycle, Hot Tub, ATV, UTV. ATVs, UTVs, Motorcycles, Fishing boats, cuddy cabins, ski boats and PWCs, the unit is also perfect for spa pools, quad bikes, golf carts and RVs. USA and European Radio Frequency. Power supply: DC 12V. Waterproof Level :IP66 Standard. Meets ASTM 117 salt/fog standard. Rubber Tactile Action Control Buttons. High Definition Positive LCD Display. Installation cut out = 79.9mm. USB extension cable x 1PCS. Wire cable x 1PCS. Install Bracket with screws x 1PCS. English Instruction Manual X 1PCS. Color retail box x 1PCS. 4 2 Way Full Range Marine Boat Waterproof Flush Mount Speakers for Outdoor Marine Boat SPA UV-Proof Jet Ski Yacht (Totaling 120W). Outside Diameter: 124mm (4.88). Mounting Hole Diameter: 115mm (4.52). Mounting Depth: 35mm (1.37) Impedance: 4 Ohm. Frequency Response: 100Hz – 18kHz. Molded ABS Plastic Basket. Magnet Material: 3.4oz. Magnet Protection: Plastic Water Guard. Application:Boat, yacht, SPA, swimming pool, ATV, UTV. Marine Rubber Radio Antenna. Waterproof and resists corrosion. Perfect for boats and campers. 13.3inch Long Mast. 52-inch Cable Long Package Content: Marine Radio Antenna x 1PCS. All items will be tested in advance before sending out. Gushi, our company is dedicating to reseach & development of marine audio series products. If you are dissatisfied for any reason, please donot be quick to leave negative/neutral feedback. Our working time:Monday to Friday.