Feature: 1. SUPPORTED FORMATS: Motorcycle ATV speaker come with two 3in full frequency waterproof speakers, support U disk playback, support MP3, WMA, WAV lossless format 2. FM RADIO FUNCTION: Motorcycle ATV handlebar speaker can automatically search and store stations, weather forecasts, traffic conditions, music channels, contain everything 3. MULTIPLE PROTECTIONS: Motorcycle ATV waterproof bluetooth amp with four levels of waterproof function, rainproof, easy to deal with all kinds of weather. Support power supply overvoltage protection, connected to reverse protection 4. APPLICABLE MODEL: Motorcycle ATV stereo sound radio system is suitable for handlebar diameter of (22‑30MM) size of motorcycles, electric vehicles 5. BLUETOOTH CONNECTION: Waterproof motorcycle ATV speaker supports Bluetooth connection and music playback. Bluetooth free connection within 10 meters, enjoy music Specification: Item Type: Motorcycle ATV Speaker FM: Frequency Range: 87.5-108MHz Intermediate Frequency: 10.7MHz Signal to Noise Ratio: 40db Noise Sensitivity: 37db Player: Signal to Noise Ratio: 40db Channel Isolation(1 KHZ): 23db Harmonic Distortion(1 KHZ): ≤5% Frequency Response: 100HZ-10KHZ ±6db Power Amplifier: Output: Speaker output Speaker Impedance: 4-8Ω Maximum Rated Output Power: 15wx2 Maximum Output Power: 20wx2 Power Supply: DC12V. Package List: 1 Pair of Speakers 1 x User Manual