Stainless Steel Dual Trumpet Electric Boat HornAFI Stainless Steel Dual Trumpet Electric Boat Horn looks good on any vessel. The compact design allows this horn to be installed in smaller spaces. Exterior is made of stainless steel with the interior diaphragm is made of type 304 stainless steel to keep the inner workings protected.Features: Stainless Steel Exterior; 12 Volt; Maximum Amperage Draw: 7 Amps; Dimensions: 16" L x 7.5" W x 4" H; Type 304 Stainless Steel Diaphragm; dB Rating: 110 at one Meter; Fundamental Frequency: 420 +/- 20 Hz, 370 +/- 20 Hz; Click here to download AFI Compact Dual Trumpet Electric Horn Manual