Good and beautiful warning whistle. The sound is very strong but must blow strongly into it. Brief emergency must not have taken a hit in the thorax and having trouble breathing to blow this whistle. I think if you have room in your pocket is better to turn to a little bigger warning whistles that requires less breath. This whistle-one is perfect for an EDC. It easily fits in your pocket to nuggets jeans. Its size is just perfect for a keyring. The whistle never leaves me.
