Product Name: Waterproof Motorcycle AUDIO MODEL: MT473 Brand Name: AOVEISE or OEM Color: Black and Red Rated Power: 2*20W Speaker Impedance: 4~8Ω DC12V Power Output: Output Speaker Frequency Response: 100HZ ~ 18KHZ plusmn; 6dB Harmonic Distortion: ≤5% Frequency Range: 87.5 ~ 108MHZ SNR: 40dB Intermediate Frequency: 10.7MHZ Noise Sensitivity: ≤ 37dB Speaker Size: 3 inch Waterproof Level: IPX4 Material: Zinc Aluminum Alloy Net Weight: 0.82KG Features: Music Players Charger for smartphone Wireless connection FM flashlight USB BT(3.0) MP3 Product description Zinc aluminum alloy construction Support Bluetooth-compatible function (BT3.0) Format supports USB/MP3 3' waterproof speaker Support mibile phone charger (1.0A) FM radio, tuning Electronic Install on handlebar Oslash;22-30mm Note: Install on handlebar between oslash; 22-30mm Packaging