SUNDELY&reg; 24 volt Black Nautilus Style Compact Air Horn 139Db for Motorcycle Car Truck 24 volt Black Nautilus Style Compact Air Horn 139Db for Motorcycle Car Truck Easy to install Voltage: 24V, DB output: 139 db Overall Dimensions: 5.9"L x 4.4"W x 3.7"H, Current Draw: 18 amps Suitable for motorcycles, cars, trucks, boats & all types of autombiles