Features 1Strong Compatibility: Compatible for IOS, for Android, for Windows system devices, enjoy the system networking, and compatible with various APP playback. 2Lossless FLAC Format Stereo: Supports music in FLAC lossless format, compatible formats are popular, music downloads are simple and easy, and true surround sound effects. 3Stable Transmission: The Bluetooth signal has an effective transmission distance of 10 meters, which is stable and free from interference. 4Multi Playing Experience: Using Bluetooth playback, U disk playback, a set of AUX input, a set of RCA output, a set of SUB subwoofer output, lossless song playback. 5Anti Interference: Digital radio IC module, signal amplification, can also search for radio stations in remote mountainous areas. Automatic search and manual fine tuning mode, automatic storage of FM channels. Specification Item Type: Marine Radio Stereo Material: Aluminum alloy, ABS Battery Model: CR2025 x 1 (built in) Battery Capacity: 300mAh Compatible Formats: MP3 IF Range: 10.7MHz Usable Sensitivity: 15db Load Impedance: 4 x 4 Signal To Noise Ratio: 50db Stereo Separation: 30db (1KHz) Tone Adjustment: 8db Audio Output: 2ch and 4ch Line Out Maximum Output Level: 1.5Vrms (3db) Frequency Response: 20Hz-20KHz Signal To Noise Ratio: 60db Separation: 50db Radio Frequency Band: FM 87.5-108MHz, AM 522-1620KHz Features: Dustproof and waterproof, high definition, bluetooth, lossless music Fitment: Yachts, engineering vehicles, excavators, forklifts, trucks, vans, etc. Package List 1 x Marine Radio Stereo 1 x Bracket 1 x Remote Control 2 x Long Screw 4 x Short Screw 2 x Nut 2 x Washer 1 x Harness