UST Hear-Me™ Whistle - 2-PackA helpful tool for emergency situations, the UST Hear-Me™ Whistle will make sure that you can always be heard. Made of durable plastic, this loud signaling device produces a high-pitched shriek that can be heard over great distances, reaching further than your voice could in the event you get lost in the woods. The whistle's pea-less design averts any chances of it becoming clogged of freezing shut, allowing it to be used in just about any weather conditions. The whistle features a clip on its base so it can be attached to clothing or gear and includes a break-away lanyard so it can be carried comfortably around the neck.Features & Specifications: Produces a high-pitched shriek that can be heard from far away Waterproof and durable Pea-less design prevents freezing or clogging, good for all-weather use Clip on base allows whistle to be attached to clothing, equipment Includes break-away lanyard for more convenient carry Two-Year Limited Warranty Dimensions (1 Whistle): Length - 2.75" (70 mm) Width - 0.75" (19 mm) Depth - 0.75" (19 mm) Weight: 0.3 oz. (8.4 g)