The latest in air horn technology, one-piece design, that requires no hoses. Installs in minutes by simply transferring the factory horn wires to the compressor. Mounts with one bolt included in kit. Produces a powerful dual tone air horn sound that is two times 2X louder than the factory horn. The Bad Boy is compact in size to fit any car, truck, motorcycle and any 12-volt vehicle that wants a loud air horn sound. Heavy-duty maintenance free compressor will provide years of dependable service. Instruction in English / Spanish