VIAIR 200 PSI High-Flow Air Source Kit Many uses including train and truck horns, light air tool use, tire inflation and more Includes pre-installed parts which is as follows, 165/200 PSI automatic pressure switch, drain cock, pressure safety release valve, and 1/2 inch air-out compression fitting Comes with the 480C which is a 200 PSI maximum working pressure, oil-less air compressor. Replaceable/relocatable air filter element for harsh environments This system does not come with air horns or an air hose. Those items must be purchased separately.