High Volume: The Horn can produce 150dB of strong sound. When you drive, no one will ignore the sound.Easy to install: Our Train Horn kit is very easy to install, you can install it manually with the harness package we distribute. The blue line and white line on the harness are respectively connected to the positive and negative poles of the original horn line, and the original steering wheel button controls the horn.High quality: The air horn is made of high quality material, which ensures durability and service life and can work in various temperature environments.General Accessories: Suitable for any 12V vehicle type, including car, truck, SUV, RV, motorcycles off road.New Upgraded Compressor: Red copper coil, vacuum chrome plating, fast response, there is no need to have air source on the car.