SKU Windstorm Whistle Weight ~12g Dimensions ~6.5cm x 3.8cm x 1.8cm Highlights Windstorm Whistle is the more compact version of the Storm Whistle and a slightly lower decibel rating than the Storm Whistle, but has the same waterproof capabilities, tremendous power and sleek design Small enough to fit into a hand bag, on keys, or on a life preserver, but loud enough to be unequivocally heard Easy to hold, easy to use and easy to hear Used by Police, military, search and rescue teams and industrial safety personnel as an alarm and personal Works by utilizing a resonance chamber attached to the whistle that enables the whistle to focus its sound like a laser beam and blast a noise twice as loud as any whistle made in the world This same harmonic chamber also acts to protect the whistle from mud, snow, sand … even water Designed to save your life by generating a tone 100% louder than a standard safety whistle Ultra lightweight at only about 12 grams Patented Design Allows Whistle To Be Heard Up To 50 Feet Underwater Unique Sounding Chamber Forces Out All Water When The Whistle Is Blown Creates a clear, high frequency sound, with a power rating over 75% greater than other safety whistles Maximum sound intensity of 103 dB With a standard whistle, nonproductive high frequency (over 5000 hertz) and nonproductive low frequency (below 2000 hertz) sounds are created. Because of the patented harmonic chamber that is unique to the Windstorm whistle, these high and low frequency sounds are recycled and focused into our extremely loud single 3150 hertz frequency of double the standard amplitude The Windstorm's focused 3150 Hertz frequency is the most readily heard tone above other noises in the environment Made in USA WARNING: This whistle is very loud. Continued use may cause hearing loss. Use ear protection and never blow close to listeners ear. Keep out of reach of children