The Vevor train horn kit is a 4-trumpet air horn system designed to deliver a powerful 150 dB alert for trucks, vans, boats, and other 12V vehicles. It includes a 12V air compressor, 1.6 gal tank, solenoid valve, gauge, and air pipes for a complete installation setup. The compressor operates between 90 and 120 psi for reliable air supply and fast horn response. Built with zinc alloy and steel construction, the kit is designed for durability, corrosion resistance, and stable performance. It is a practical upgrade for drivers who need a louder, more attention-grabbing horn system.