Orange - Official US NAVY Storm All Weather Safety Whistle Durable thermoplastic polyurethane frame designed

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Orange - Official US NAVY Storm All Weather Safety Whistle Durable thermoplastic polyurethane frame designedStorm 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%