Effective air horn with a classic look. These beautiful chromed brass dual-trumpet air horns use a small 12V DC air compressor to produce a rich, melodic sound that commands attention. ABYC and NMME standards are met for boats under 66' (20 meters) by the 121dB loudness that comes from these externally mounted trumpets. A single mounting point accentuates the elongated look of the horns and simplifies installation. Give your boat a classic look that commands attention in more ways than one with an AFI dual trumpet air horn. Key Features Dual trumpet air horn with a classic look Chrome plated bass construction for corrosion resistance Non corrosive Lexan diaphragm Includes air compressor, air tubing, fittings and hardware dB rating of 121 at1 meter, 1/3 octave bandEngineered for 12V systems (24V version available) Meet ABYC #A23, NMMA regulations for boats under 20 meters (66')Installation Instructions