The PsychoBlasters have never sounded better. These powerful horns deliver a full-blown sound and amazing looks. They are made of solid brass and the quality is just ridiculous. Combined with the included 120 PSI Viair air source kit they are insanely loud. The fast-fill 1.5-gallon air tank provides plenty of air to the horns so you can keep on honking.This air horn kit easily fits on just about anything! Everything you need is in the box ready to be installed. The unit pulls just 18 amps at peak performance and can recharge its tank in 35 seconds.