A great whistle. Works very effectively and will get just about anyone's attention. The whistle itself was a little larger than anticipated but not really a deal breaker.

Works great, you get the attention of everyone with very little effort. it was great to see every one stop at once.

I purchased this whistle along with a Fox40 Classic to use for lifeguarding. While they are both very loud when blown properly (you have to put a lot of air behind it) I think the Sharx barely edges out the Classic in performance.

This whistle, in comparison to the Classic, requires a little bit less air to make a noise, meaning you don't have to blow as hard to get someone's attention.

The only downside to this whistle is that its shape is not as friendly for keeping in your mouth as a classic whistle. Still very much do-able, but not as comfortable. Oh, and maybe it's just a little too loud.

For reff ing water polo games, and just letting out a loud whistle!