The HornBlasters Stealth Black Caboose 127H Air Horn Kit gives you a loud, compact air horn system that's easy to mount and delivers serious sound. At the center is our Caboose air horn, known for its strong mid-tone that stands out from typical air horns. Even though the horn is just over a foot long, it delivers volume that competes with much larger train horns. This kit includes a 1.5 gallon air tank paired with our 12 volt compressor, providing up to 5 to 7 seconds of honk time at full pressure. The air source unit comes pre-assembled with the compressor already mounted to the tank, along with pre-installed fittings to make the setup faster. Once mounted to your vehicle, you'll need to wire the system and connect the air line to the horn. With the included hardware and simplified layout, it's one of the easiest kits to install if you're looking for a compact system that still makes a big impact. The Caboose 127H is a great option for cars, trucks, and SUVs with limited space but no shortage of personality. If you want a loud horn without taking up your whole trunk or bed, this kit delivers.