Here's what other sites are saying:
The SHARX features a 4-resonator body that emits an unbelievably powerful 120db dual-frequency signal. A true outdoor whistle, the ABS plastic body is co-molded with rubber inserts for grip and comfort during use.
At roughly the same decibel level as a jet engine, Adventure Medical Kits' SHARX Whistle packs a serious punch in the outdoors. Its dual frequency, 120 dB blast can easily be heard when you are in need of help or wish to signal a member of your team. Fox 40's pealess design ensures a pure, loud sound.
- Mountain Gear
Flawless and consistent performance Reliable and trusted whistle for search rescue outdoors and personal safety Emits effortless authoritative sound of 120 dB that can be heard for miles over ambient noises Made from durable polycarbonate and comolded elastomer for added comfort and slip resistance Specifically designed to perform in the nastiest weather conditions