●12V White Epoxy Coated mini single trumpet air horn is made of solid brass construction with non-corrosive Lexan polycarbonate diaphragm ●Includes compressor, air tubing, fittings and hardware ●Maximum amp draw: 12 volt: 20 amps ●dB rating: 126 at one meter, 1/3 octave band. Meets the ABYC and NMMA regulations for boats up to 20 meters/66 feet. ●Fundamental frequency: 630+/-15Hz