Single Trumpet Chrome Brass Mini Air Boat Horn Kit with CompressorAFI Single Trumpet Chrome Brass Mini Air Boat Horn Kit looks good on any boat. Meets ABYC/NMMA regulations on boats up to 66 feet in length. AFI Marine air horns produce sound levels ranging between 120 and 127 dB. The 12/24 Volt compressors are both CE listed. Product Features: Max Amperage Draw: 12 Volt: 20 Amps; 24 Volt : 10 Amps; dB Rating: 126 at one meter; 1/3 octave band; Dimensions: 9.5" L x 3.5" W x 3.5" H; Fundamental Frequency: 630 +/- 15 Hz; Non Corrosive Lexan polycarbonate Diaphragm; Click here to download AFI Single trumpet Chrome Brass Mini Boat Horn Kit Manual