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.