These horns have never been so loud. The Rhino 244 train horn offers the power of the Viair 444C and incredible performance of the Rhino horn to bring you the loudest compact horn kit on the market.Simply put, this is the best 120 PSI compact train horn kit currently available. It's designed specifically for smaller vehicles where larger tanks may not fit. The compressor is overpowered (200 PSI capable, constant duty, and powerful!) to ensure the best reliability, and only pulls 19 amps at its peak. At 120 PSI, the Rhino Horn is simply ridiculous!