I have to say I was shocked at how bad this whistle is. I mean, how could it be worse than the $1.50 one at the toy store? It says it is "pealess", which I think means it has no ball in it and so doesn't have the familiar trilling sound of a referee's whistle. That is fine--I just wanted a loud whistle for emergency use. As the other reviewer said, this is high pitched but not loud, and you have to blow really hard to even get a decent sound out of it. Highly unrecommended.