2 USB input available for Connecting MP3 players or flash drive. 3 Wireless Music:Directly listen the music wirelessly on your Device Compatible with Bluetooth. Waterproof Level: IPX66: Hit the water and enjoy your music with the marine grade stereo. Easy to Install and fully compatible: 1Product Dimensions (L x W x D): 6.1(155mm) x 4.1(105mm) x 1.57(40mm) 2Installation Dimensions(L x W x D): 5.5(140mm) x 3.54(90mm) x 3.14(80mm) 3It is compatible for many ATVs, UTVs XP900, Powersports Vehicles, Boats, Heavyduty Car Vehicles, even in SPA rooms. 4 channels x 45 watts Built-in Power Audio Amplifier: Use the best audio amplifier to rock the music on the move! Note: When the radio and the external temperature difference is relatively large, the radio screen will produce fog, stop working for about 2-3 hours will automatically disappear. Special Feature: Portable, Waterproof. Connectivity Technology: Compatible with Bluetooth. Product Dimensions: 6.1″L x 4.33″W x 2.17H. Power Source: Corded Electric, Battery Powered. Water Resistance Level: Waterproof. Item Weight: 1.98 Pounds. Package Dimensions: 17.72 x 9.25 x 5.04 inches. Item Weight: 1.98 pounds. Item model number: 13. Date First Available: July 9, 2017. And we will work with you to resolve it to your satisfaction.