Powersports Motorcycle Speaker and Amplifier Sound System - Bluetooth, Weatherproof, 3 inch Speakers, 2 Channel Amplifier, FM Tuner, USB, SD, Auxiliary In MCBK520B Rev up your playlists with the BOSS Audio Systems MCBK520B weatherproof sound system. Hop on your motorcycle, scooter or ATV and enjoy great music with the power amplifier & two 3 inch full range speakers. Hook your smartphone or MP3 player up to the auxiliary input for instant gratification. Bluetooth audio streaming lets you play your favorite music apps like Pandora and Spotify. The USB and SD ports provide even more ways for you to listen to your music. Listen to FM radio stations and control it all with the multifunction wireless remote control. The MCBK520B features weatherproof speakers and amplifier to provide protection against the elements. • Pair of Black 3" Full Range Speakers • 600 Watt Max Amplifier (Dimensions 5.2" x 3.15" x 1.89") 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: < 0.01% Features Bluetooth Audio Streaming Wirelessly stream audio via Bluetooth from compatible devices so you can listen to streaming music services such as Spotify and Pandora through your system. Aux Input The Aux Input allows you to connect to the audio output of an external device such as an MP3 Player or Smartphone so you can enjoy your music through your system. Weatherproof Speakers The speakers are weatherproof which means they are protected against moisture from rain, splashed water, fog and other elements. Keychain Remote Control Wireless multifunction remote control allows you to play/pause, choose tracks, adjust the volume and power on/off your system while riding. Mounting Hardware Included The mounting hardware and wiring needed to do the installation are included.