Boss Audio Motorcycle/UTV 3in Waterproof Speakers and Amplifier System USB/SD/FM Black. 5mm Aux Inputs Frequency Response 80Hz to 15KHz SN >85dB THD: Specifications for Boss Audio Motorcycle/UTV 3in Waterproof Speakers and Amplifier System USB/SD/FM: Manufacturer: Boss Audio Color: Black Features of Boss Audio Motorcycle/UTV 3in Waterproof Speakers and Amplifier System USB/SD/FM: Black 600 watt Motorcycle/ATV Sound System with Bluetooth Streaming and FM Tuner Weather Proof Pair of Black 3" Full Range Speakers 600 Watt Max Amplifier with Wireless Keychain Remote Bluetooth Audio Streaming - Stream your Favorite Music or Music Service like Spotify or Pandora Wirelessly Built-in FM radio USB SD and 3.5mm Aux Inputs Frequency Response 80Hz to 15KHz SN >85dB THD: Package Contents: Boss Audio Motorcycle/UTV 3in Waterproof Speakers and Amplifier System USB/SD/FM Boss Audio MCBK520B: Motorcycle/UTV 3in Waterproof Speakers and Amplifier System USB/SD/FM Black