Compact size Loud Air Horn. Can fit easily on a Boat, Motorcycle, Car, Truck, Van, SUV, Pick-Up, ATV, or Motor home, that has a 12 Volt electrical system. The compact size allows it to be easily installed in any tide space under the hood or to your existing horn mounting location. Water and weather resistant. No tubing to hook up, no separate compressors to install, its all included in this compact unit. Rugged steel compressor and high impact resistant ABS construction housing. Loud dual tone high/Low sound. Includes air compressor and twin tone air horns, all combined in one compact unit. Comes with a mounting tab, hardware kit, horn relay and installation instructions.