This is a super loud air horn I was looking for something easy to install that would not break the bank. I only drilled one hole and used existing hole. Tapped into the existing horn wire with 1 wire clip when you press the horn on the steering wheel everything blows together. 20-30 min. install. Forget looking at the price no need to spend more, this is an easy mod. and LOUD!!@ has Train Semi sound Not Trumpet.