About 2 years ago we had one of our customers come into the marina I worked for and wanted us to install one of those things on his boat. He had the horn already and it cost around $1,500 alone and we had to go get a whole air tank setup and all to install it. It only took about a month and that stupid horn broke the hatch it was mounted to and all cause it was so big. Although after it was done I jumped into the boat when we put it back in the water and I was pulling up to the gas dock where we have a few girls who work there pupming gas, I nosed that boat up to the dock and they walked right up to it to grab the boat to help tie it up. I hit that horn and they about jumped clean off the dock, funny as heck! Other that that I thought that horn was retarded.