Years ago we offered those old traditional-style air horns. Problem was, you had to find a place for the compressor, then a place for the horns, then hook up the tubing... Work, work, work; not much fun at all. These modern versions are much easier to install and everything is built into these compact units! These are true Italian Air Horns, and as you may know, only the Italians know how to make super-loud, ear-piercing horns! These horns are easy to mount, come with a relay, and easy installation instructions. Let's see: get taken out by a semi, or let them know you're there? You get to choose. Of course if you're going through town at midnight, blasting your horns, you deserve to get thrown in the pokey. Super loud, rated at 139 dB at 4 feet, 115dB at 6 feet. We now have three styles to choose from: The compact red horns, the ultra compact black ones, or the new lower tone truck horn which has a 300 cycle low tone compared to the 530 cycle high tone of the other two. The compact red horns are 5 1/2" tall, 3 3/4" wide, and 4 1/4" deep. The ultra compact black horns are 4 3/4" tall, 2 3/4" wide, and 4 1/4" deep. 12 volt, 10 amp with two tones at 530 Hz and 680 Hz. The air pump is steel and the horns are high-impact plastic. Small enough to mount on cars, trucks, boats, or lawn mowers! The black horns are great for motorcycles as well. From our excitable, overly talkative friends in Italy.