At 150 PSI, the Shocker horns are simply ridiculous!
T. approved airline;6 ft of 3/8 air line (for intake);18 ft of 12 gauge power wire;1/2 NPT electric solenoid valve;HornBlasters 200 PSI air gauge;Brass NPT fittings kit including safety valve and blow-off;Wiring, plumbing kit, mounting hardware, detailed instructions;Use this product in a safe and responsible manner, minimum distance of 100 ft from others;California Residents: WARNING HornBlasters Conductor's Special 244 Nightmare Edition Train Horn Kit (Black) - HK-S4-244K The horns are hand-tuned in the USA to the government mandated train signal chord. These horns are ridiculously loud and, more importantly, actually sound like a train! It features the insanely loud, American-made, Shocker Horns.