You guys got a great deal!!! That is one-tenth what a compressor setup would cost and like I said, if you guys don't think it is loud enough, shove two in there and you will still be way ahead for that price. The guy I bought from just emailed me to let me know he put up a website and you can order via credit from there.
http://www.stebel-usa.com/product/32...ct_Truck_Horn/