Equip your vehicle with the Kleinn HK3-1 complete direct bolt-on ProBlaster triple black air horn and onboard air system, featuring three tuned all-metal trumpets measuring 14.25 inches, 11.5 inches, and 9.25 inches in length with 3-inch bell ends. Engineered for universal application, this premium truck horn configuration delivers a startling, high-impact blended three-tone blast that cuts through ambient noise to get immediate attention. Providing the pneumatic power is a Model 6270RC 130 PSI waterproof electronic air compressor paired with a generous 1.0-gallon all-steel air tank equipped with an internal Cortec anti-corrosion coating to provide maximum blast time. Designed for a clean, professional, and seamless installation, this complete standalone package comes right out of the box with a pre-wired Vortex 4 Series Model 307 electronic solenoid valve, a 1/4-inch high-pressure airline, a 12-volt relay, a pressure switch, and all necessary mounting hardware to ensure long-lasting durability on any custom build.