MPC Train Air Horn Kit for Truck: 3 Huge Trumpets 12-V Heavy Duty 150 PSI Air Compressor & Inflation Kit This is a complete Train Air Horn Kit that Includes everything needed. Chrome Finished Train Horn Trumpets with a complete onboard air system that will impress your friends! Test results reach 152.3 dB output. [TRUMPETS] 3 Chrome Finished Trumpets [AIR SYSTEM] All-In-One air system includes a 150 PSI -12 volt air compressor, 2 Gallon air tank, Pressure switch (120 PSI on, air tube, and horn button. Mounting hardware included, and air fittings pre-installed [WIRING KIT] Wiring/Installation Kit includes 12 feet of 10 gauge power wire, 15 feet of 20 gauge power wire, 20 amp fuse and fuse holder, Teflon plumbers tape for air fittings, Assorted crimps and wire connectors, Zip ties, Complete color coded instructions for simplified install [BONUS ITEM] This kit also includes: 200 PSI Pressure Rating, 25 ft max length (Coils down to 15" long), Inlet: 1/4" Male NPT Swivel Fitting, Outlet: Tire Inflation Chuck. Perfect for adjusting tire pressure on the go!