The train horns for trucks can produce approximately 150dB of sound. 3 different size horns emit a super loud warning, audible from several miles away. This air horn comes with an air compressor featuring a 6 liter air tank and a built-in protection switch, which will automatically shut off when the air pressure reaches 120PSI. Our train truck horn kit is composed of stainless steel horns and carbon steel body to ensure maximum strength and durability. It is suitable for harsh weather conditions or extreme temperatures. This truck train horn is easy to install with all mounting hardware included. It is flexible and portable, so you can easily detach it from one vehicle to another...