Storm safety whistle

*The Storm All-Weather Safety Whistle is the loudest whistle on the market.
*Its unique patented design allows it to be heard under water, up to 50 feet, because the sounding chamber forces all water to be purged when the whistle is blown.
*It's perfect for divers, lifeguards, and for recreation.
*Creates a clear, high frequency sound, with a power rating over 75% greater than other referee and safety whistles.
*Made in the USA.
*Available in yellow, orange or black.