Storm safety whistle. Worlds loudest whistle. Can be heard through walls, through glass and through water. Can be heard over 1/4 of a mile through trees and over a 1/2 mile water. Decibel reading varies between 118 and 120 DB. 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. Creates a clear, high frequency sound, with a power rating over 75% greater than other referee and safety whistles. Navy Seals and Coast Guard approved. For personal protection. When being heard is a matter of life or death. North American fishing club - seal of approval. Great for sporting events, campers, hikers, hunters, scuba divers, police and firefighters, adopted by US Military. Made in USA. Storm whistles. US Navy storm all weather safety whistle.

• GSA Compliant.