I bought this because I have a road job coming up and I was under the impression that this was going to be some sort of super whistle that was much louder than your average whistle. Boy what a waste of money! This thing is not loud at all! My wife then proceeds to show me her whistle which is a more traditional one available most anywhere for like .50 cents with the cork ball inside and it's super loud! Unfortunately, I can't return this now because it's out of the packaging and I've put my mouth on it. You got me this time Galls!