Have the most unique sound on the road with the Dolphin horn. The specially engineered middle chamber creates a repetitive sound to give this horn a different but attention-grabbing sound. The Dolphin horns come in a beautiful black finish, includes mounting hardware and is ready to accept large half-inch airline. Black finish;Pre-installed air valve;Accepts 1/2 air line;Includes: Dolphin Air Horn;12-24 Volt electric air valve;Mounting hardware;One year manufactures defect warranty;California Residents: WARNING