Tuner Section FM Stereo Frequency Area US, Europe. Bluetooth:long distance music Streaming. RMS Power Output:4 x 45W. Power supply:DC 12V. Waterproof level:IP66 Certification. Meets ASTM B117 salt/fog standard. Dimensions Mounting Hole:88.12mm. Dimensions Mounting Depth:70mm. Input Types:Bluetooth, USB, AUX. Outputs:1 pair RCA Pre-Amp Out, One Way Input. Car, motorcycles, yacht, fishing boats, cuddy cabins, ski boats, the unit is also perfect for spa pools, quad bikes, golf carts, UTV, ATV and RV. Mounting Hole Diameter: 97mm(3.818). Mounting Depth: 35mm/(1.37). Grill material: UV Plastic. Magnet Material: Ferrite, 4oz. Magnet Protection: Plastic Water Guard. Application: Boat, yacht, SPA, swimming pool, ATV, UTV. The 4 inch Marine Speaker has a fully waterproof design, UV and salt/fog protection. The flexible mast helps it withstand bracing winds, while the corrosion-resistant rubber exterior ensures that it won’t succumb to salt and spray. You can mount the antenna in a variety of locations on almost any boat, Heavyduty, Car Yacht ATV UTV RV Tractor environment. Waterproof Engineering Design For Humid Environment, Indoor/outdoor Available Waterproof Grade IP66, Meets ASTM 117 salt/fog Standard The Flexible Mast Helps it Withstand Bracing Winds Weight: 200g, Cable Length: 52″, Antenna Length: 13.3″ The flexible mast helps it withstand bracing winds, while the corrosion-resistant rubber exterior ensures that it won’t succumb to salt and spray. Waterproof Engineering Design For Humid Environment, Indoor/outdoor Available Waterproof Grade IP66, Meets ASTM 117 salt/fog Standard The Flexible Mast Helps it Withstand Bracing Winds Weight: 200g, Cable Length: 52″, Antenna Length: 13.3″. 1PCS x Marine Stereo Receiver. 1Pairs x Marine Speakers. 1PCS x Marine Antenna.