Bad Boy is the latest in air horn technology, a patented one-piece design, that requires no hoses. Installs easily 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 a factory horn. The BAD BOY, is compact in size to fit any 12-volt vehicle. Wolo's Bad Boy will provide the vehicle owner a powerful air horn sound. They will hear you before they see you™. Built with a Heavy-duty maintenance free compressor that will provide years of dependable service. Instruction in English / Spanish.