Black finish Shocker S4 train horn;10 to 14 seconds max honk time;Viair 110/150 PSI pressure switch;Remote mountable intake filter;Air filter cartridges; 10 ft of 5/16 inch D.O.T. approved airline;17 ft of 1/2 inch D.O.T. approved airline;6 ft of 3/8 inch airline for intake;HornBlasters 200 PSI air gauge;18 ft of 10 gauge power wire;18 ft of 18 gauge power wire;Wiring kit with fuse holder;Brass NPT fittings kit including safety valve and blowoff;HornAir 5 gallon tank;Viair 400C air compressor;12 volts DC;26 amps;Mounitng hardware included;WIring and plumbing kit included along with detailed instructions;California Residents: WARNING Powerful, insanely loud, and all in a compact kit: the Conductor's Special 540 train horn kit delivers the performance you need. The Conductor's Special 540 features the insanely loud, American-made, Shocker Horns. These horns are ridiculously loud and, more importantly, actually sound like a train! The horns are hand-tuned in the USA to the government mandated train signal chord. Simply put, they sound completely authentic.