Viking Horns High Powered Sound of 170 Decibels air horn kit. Trumpets are chrome plated metal. Will replace your original horn, or can be installed as an auxiliary horn. Comes with a 5 gallon air tank, 12 volt 200 PSI heavy duty maintenance free 100% duty cycle air compressor, 1/2" Diameter Air Hose for increased air flow that produces a louder sound, inline 1/2" Heavy Duty Electric Air Valve Solenoid. Includes Mounting Hardware, Brass Fittings, Air gauge, 200 PSI Air Pressure Switch, installation instructions, Electric Wires, Free Horn Button. Ideal for vehicles such as Trucks, RV's, SUV's, Pick-Ups, Boats, and other applications.