Simply link your SmartPhone to the weatherproof handlebar controller via Bluetooth and control all volume and track up/down music functions direct from the handlebar buttons. This is a full range class D audio amplifier and is spec'd at 200watts RMS per channel X2 channels, (400w total) driven continuous into a 2-ohm load @ 14.4vdc. Amplifier mounts to the custom made stainless steel bracket system inside the left saddlebag. BlueTooth control mounts to the black-powder coated SS handlebar bracket. Custom made heavy-duty plug-n-play wiring harnesses are all built at the J&M factory in Tucson for this specific application, to allow connection to either 2 or 4 total speakers on the RoadKing. Wiring harness system includes waterproof plugs/pins at each location including the left side saddlebag panel connector (like CVO) & Bluetooth control head connections. Top quality heavy gauge power/ground wires are used for the fused battery connection, along with all necessary mounting hardware & complete installation/operation instructions. Amplifier measures 7-1/4ö X 4-3/4ô X 1-3/4ö. AMP 400W2 CH BLU 98-20 RK