Viking Horns V618K Loud 12 Volt Dual Trumpet Air Horn for Car, Truck, Suv, Boat Sound output:110dB Construction: Metal base withchrome plated ABS dual trumpets Can easily fit on a Boat, Motorcycle, Car, Truck, Van, SUV, or Motor home Dimensions: 6" Wide x 8-1/4" Long x 3" High Power source: Requires 12 volts