This is a great whistle set for a basketball coach. Not sure why other 3 chamber whistles cost more at the store or even online but this GoGo set is perfect and priced right. I know its a loud whistle b/c the kids near me always make a face or cover their ears when I blow it in a loud gym full of young kids. Just what I needed - no problems.

My samba school (bateria) uses this to do calls and breaks.Tried other whistle with peas, just not the same sound.

For all you people wondering about this whistle, I bought 20 of them and they came in a nice case and are blue in color. I was a little concerned that they wouldn't perform the same as the Fox 40 whistles, but they are just as loud, and just as shreiky. The nice thing here is, each whistle comes in its own individual case, with a lanyard (matching in color). This lets you buy one product without having to fork out more cash for the neck lanyard. Anyway, if you buy a bunch, there is a big break in shipping, (I think mine was free). The whistles are as good as the fox 40's at a cheaper price. I use them to ref basketball and football games. They are definately loud enough for indoor or outdoor use. You won't find another deal like this, especially comparing the price to the 5+ you pay for the Fox 40. So if you are looking for a great whistle at an incredible price, this is the whistle for you. A+ and 5 out of 5 stars.