BOSS Audio MC900B 500 Watt, 4 Channel, All-Terrain, Weather Resistant Amplifier System With Bluetooth Multifunction Remote Remote Control: Bluetooth A2DP Wireless Audio Streaming (Stream and Control your Favorite Music And Music APPs like Spotify / Pandora wirelessly) Soft Touch Buttons, Surface Mount, Flush Mount or Handle Bar Clamp, Easy Pairing with Auto Re-connect, Weather Resistant, MC900B Amplifier: For all 12-Volt Applications, Compatible with Audio Output of iPod / iPhone, Smartphones, and MP3 Players, Weather Resistant 4 CH Full Range Amplifier, 1 Pair Pre-Amp Outputs, USB Charging (1A), Aux-In, Slim Compact Footprint, USB Charging RCA preamp output to daisy chain multiple amps, Compatible with MUSB35 USB / 3.5mm extension kit kindly refer Troubleshooting: Pg. 12 and Installation: Pg. 3. Three Year Platinum Online Dealer Warranty