The new FOX 40 heard for kilometers, is the loudest whistle made an ideal feature for something designed to get you noticed in a tough spot. The innovative design has no pea and two sound chambers and four resonators, it works in both wet and dry conditions, is made from tough polycarbonate (co-molded with an elastomer grib so the whole thing is one piece) and will always work with a simple blow. “The whistle is incredible. I highly recommend covering your ears when you blow it. The first time I used it my ears rang for several minutes from the intense sound. The sound is also easily localizeable, meaning you instantly know what direction it is coming from. In search and rescue operations this feature is crucial” P. Gilwit, M.D. ON