Boat DAB+ Radio Kit Waterproof Marine Stereo Receiver and Speakers and Antenna. Uses USB, RCA, DAB/DAB+ Bluetooth Audio Sources. Tuner Section FM Stereo Frequency Area US, Europe. Bluetooth: long distance music Streaming. RMS Power Output: 4 x 45W. Power supply: DC 12V. Mounting Hole Diameter: 115mm(4.52). Mounting Depth: 35mm/(1.37). Application:Boat, yacht, SPA, swimming pool, ATV, UTV. ATV UTV RV Tractor environment. Waterproof Engineering Design For Humid Environment, Indoor/outdoor Available. Waterproof Grade IP66, Meets ASTM 117 salt/fog Standard. Antenna Length: 13.3. 1PCS x Radio/mp3 Unit. 1PCS x Wire Cable. 1PCS x Install Bracket with nuts. 1PCS x English Instruction Manual. 1Pairs x Marine Speakers. 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.