The Wolo 419 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 and 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. Instructions in English / Spanish.