This on-board system is designed for use with any high-pressure air horn that requires an on-board air system. Comes with a Half Gallon air tank with 5 ports, a 150 PSI heavy duty compressor, pressure gauge, pressure switch, fuse, hose, fittings, thread sealant and mounting hardware. Has the dependable quality you expect from Vixen Horns. Ideal for all vehicles with a 12V system.