This all-metal, 152 decibel horn is a practical and reliable choice for any vehicle. With a low range of 307/347/440 Hz, it delivers a powerful sound that can't be ignored. The horn's compact size of L 16-1/2 in. x W 14-3/4 in. x H 11 in. makes it easy to install, and its lanyard valve ensures convenient operation. The 12-volt compressor, with a duty-cycle of 33% @ 100 psi, provides efficient and consistent air supply. The 2.5-gallon tank, equipped with a pressure switch and safety relief valve, offers ample capacity for extended use. With its durable construction and practical features, this horn and compressor combo is a reliable choice for any vehicle.