Product Information: This On-board system is designed to use it with any high-pressure air horn that require an on-board air system. Comes with a 5 Gallon (18 liter) air tank, 200 PSI heavy duty black color compressor, air pressure gauge, pressure switch, hose and mounting hardware. This is truly a great quality product you can count on. Ideal for Cars, SUV, Truck, RV, Marine and more.