Full range class D audio amplifier 175W RMS per channel times 2 channels (350W total) 2 OHM load at 14.4 VDC Amplifier mounts using the provided custom made stainless steel bracket system inside the left saddlebag The Bluetooth control mounts to the black-powder coated stainless steel handlebar bracket Bluetooth allows the rider to control all volume and track up/down music functions right directly from the handlebar buttons, by simply linking Smartphone to the weatherproof handlebar controller Custom made heavy-duty plug-n-play wiring harnesses allow connection to either two or four total speakers on motorcycle Wiring harness system includes waterproof plugs/pins at each location including the left saddlebag panel connector and the Bluetooth control head connections Complete instructions and hardware are included, as well as the heavy gauge power/ground wires that are used for the fused battery connection Amplifier measures 7-1/4" L x 4-3/4" W x 1-3/4" T