perfect for: Car, motorcycles, yacht, fishing boats, cuddy cabins, ski boats , the unit is also perfect for spa pools, bikes, golf carts, UTV, ATV and RVThis Gauge-Style AM/FM/USB Multimedia Receiver slides into current gauge openings or cup holders, giving boaters everything they want at a great price.This smallest marine stereo ever is portable-media- ready and features AM/FM radio, USB, and aux-in for connecting portable media devices.Solid chassis and IP-66 salt fog rating for durability.perfect for smaller fishing boats, cuddy cabins, and PWCs, the multimedia receiver is also perfect for ATVs, golf carts, , and more.AM/FM parameters1. Frequency range FM: 87.5-108 MHz AM: 522-1620 KHz2. Intermediate frequency: 10.7 MHz3. Noise limit sensitivity less than 5uV4. IF suppression less than 50dBMP3 parameters1. Signal to noise ratio more than 55dB2. Response frequency: 20-20 KHz3. A/D conversion filter: 16BITaudio and other parameters1. Output: 4X25W2. Input: DC12V3. Load impedance: 4-80hms/channelMaterial: aluminum alloycolour: Package Contents: 1 x Bluetooth audio