Description: Product Type: Electronic Pump Horn with Relay Applications Vehicle: Fits on Any 12 Volt Vehicle(Car, Truck, SUV, Motorcycle, Yacht, Boat, Busses etc) Easy to Install(Mounts with only 1 screw) Brand New Compact Dual Tone Air Horn. No Air Tubes Needed. Specification: Voltage: 12V Sound level @ 2m: 115dB Sound level @ 10cm: 139dB Sound type: Dual Tone Frequency: 530/680Hz ±5% No External Air Supply Needed Material: Plastic Size: Approx. 110*95*140mm/4.3*3.7*5.5 Inch Package Includes: 1 Piece Horn 1 Piece Relay Mounting Accessories