The Challenger roof mount Air Horn comes complete with a maintenance free on board air system. Kit includes everything that is needed to install on any 12 volt vehicle: a deluxe roof mounted horn that is all metal with triple chrome plated trumpets, heavy duty compressor, solenoid, tank, hoses, mounting hardware, and instructions. All moving parts of the air compressor are manufactured to precision tolerances. The compressor's motor computer balanced, reducing noise and vibration. The kit also includes 20 feet of plastic hose with air fittings to inflate tires, shocks, rafts or any application requiring air. Trumpets are built on a heavy mounting base that secures to the vehicle using four rust- resistant stainless steel bolts. Will deliver a powerful sound to at 125 decibels. Kit comes with all needed mounting hardware. English & Spanish instructions included.