SUPER LOUD 3 Trumpet Train Air Horn system. Produces a High Powered Sound of 170 Decibels. Trumpets are chrome plated metal. Will replace your original horn, or can be installed as an auxiliary horn with the FREE horn button included. 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), 1/2" Heavy Duty Inline Electric Air Valve Solenoid. Includes Mounting Hardware, Air Safety Release Valve, Brass Fittings, Air gauge, 170/200 PSI Air Pressure Switch, installation instructions, Electric Wires, FREE Horn Button. Ideal for vehicles such as Truck, RV, SUV, Pick-Up, Boat, and other applications. Trumpets sizes: L 16-1/4" x W 15" x H 11". Air tank dimensions: 21" L, 10-1/2" H, 8-1/2" diameter. Air compressor dimensions: 10-3/4" L x 4" W x 6-3/4" H.