The Electric Twin Tone Horn With Air Compressor is a compact and practical solution for those in need of a powerful sound. With a built-in air compressor, this fully electric horn delivers a two-toned sound at an impressive 112 decibels. Measuring just 5.4 inches x 4.5 inches x 3.6 inches, it fits perfectly in the palm of your hand, making it ideal for compact spaces. This horn is R.28 ECE/ONU approved and easy to install, eliminating the need for additional purchases like compressors, bulky air tanks, hoses, or fittings. It is compatible with a wide range of vehicles, including commercial trucks, Mercedes Sprinter vans, work trucks, tow trucks, off-road vehicles, RVs, buses, and motorcycles.