This Horn system produces a High Powered Sound of 170 Decibels. Metal trumpets in black color. 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), 1/2" Heavy Duty Electric Air Valve Solenoid. Includes Mounting Hardware, Brass Fittings, Air Gauge, 170/200 PSI Air Pressure Switch, installation instructions, Electric Wires, Free Horn Button. Teflon Tape. Ideal for vehicles such as Trucks, RV's, SUV's, Pick-Ups, Boats, and other applications. Horn dimensions: L 16 1/4 in. x W 15 in. x H 11 in. Air compressor dimensions: 10-3/4" L x 4" W x 6-3/4" H. Air tank dimensions: 21" L, 10-1/2" H, 8-1/2" diameter.