The latest in air horn technology, one-piece design that requires no hoses Mounts with one bolt, included in kit Produces a powerful dual-tone air horn sound that is 2X louder than the factory horn The Bad Boy is compact in size to fit any motorcycle with a 12-volt system to provide a loud air horn sound Heavy-duty maintenance-free compressor will provide years of dependable service Dimensions 2-1/2" W x 4-1/2" L x 4-1/2" H Black Purchase Wolo Motorcycle wiring kit 561-126 to make installation a breeze