Very well made product! They are extremely loud. While the directions are very Spartan, a quick online search will yield tons of helpful results. I really enjoy the commanding sound these give off. View more reviews...
I only wish it was a little cheaper, all I got was the bracket some fittings and some tubing, I still had to go out and buy the air hose fitting so I could hook up my air line.
But it did the job. Just what I needed. View more reviews...