Feature: 1. Stable Signal: The Bluetooth signal has an effective transmission distance of 10 meters and is stable without interference. The digital radio IC module can amplify the signal and search for radio stations even in remote mountainous areas. 2. Unique Design: A variety of playback experience, which is fast and convenient, using Bluetooth playback, U disk playback, lossless song playback, and the transmission is more delicate. 3. Stereo Sound: Host support lossless format of music to achieve CD sound effects, compatible with popular format, music downloading is simple and easy, and with surround stereo sound. 4. Practical Compatibility: This Bluetooth audio can be compatible for IOS system devices, enjoy system networking, while compatible with a variety of APP playback. 5. Outstanding Advantages: This Bluetooth audio has automatic station search and manual fine tuning modes, which and can automatically store FM channels. Specification: Item Type: Marine Bluetooth Audio Material: Aluminium Alloy and ABS Compatible Format: MP3 IF Range: 10.7MHz Available Sensitivity: 15dB Load Impedance: 4x 4Ω Signal to Noise Ratio: 50dB Stereo Separation: 30dB (1KHz) Tone Adjustment: ± 8dB Audio Output: 2CH & 4CH Line Out Maximum Output Level: 1.5Vrms (± 3dB) Frequency Response: 20HZ-20khz Signal to Noise Ratio: 60db Separation Degree: 50dB Radio Frequency: FM 87.5-108mhz, AM 522-1620khz Features: Dustproof and waterproof, HD Bluetooth, lossless music Suitable Models: Yachts, engineering vehicles, earth digging vehicles, forklifts, trucks, vans and other models. Package List: 1 x MP3 Player1 x Microphone2 x Screws 2 x Nuts2 x Washers1 x Manual Note: