Used by Special Forces worldwide, the JetScream Safety Whistle from Ultimate Survival Technologies is a must in all kinds of rescue situations! One of the loudest of its kind at 122 decibels, this whistle can be heard above most natural and man-made noise, and wont freeze, clog, or rust like traditional whistles thanks to its pea-less design. Compact and lightweight at just over 2" in length and less than 1/2" thick, it can be used by adults and children in the water, on the trail, or even in the city. Buoyant so you wont lose it under water and made of ABS plastic for a durable, long-lasting life. Key Features 100% waterproof it works even when wet Pea-less construction for all-weather use Easily attaches to packs, PFDs, and key chains Specifications Size: 2-1/4”L x 1-3/10”W x 1/2”D Material: ABS plastic Warranty: Lifetime Limited