High Volume: The train horn can produce 150 DB of strong sound. When you drive, no one will ignore the sound. Greatly enhance driving safety. High Qality: The air horn is made of high quality material, which ensures durability and service life and can work in various temperature environments. With Air Pump: New Upgraded Compressor, red copper coil, vacuum chrome plating, fast response, there is no need to have air source on the car. Easy To Install: Our air horn kit is easy to install, you can install it manually with the harness package we distribute, wiring instructions with color diagrams are attached. General Accessories: Suitable for any 12V vehicles trucks boats cars vans lorries SUV RV motorcycles off road etc.