With a rating of 120 dB, it is about 75% more powerful than other safety whistles on the market. A patent-pending harmonic chamber makes sure that water does not enter the space that produces the signal-noise, enhancing this whistle's durability. You can find the product in multiple attractive colors so that you can spot it quickly for use in an emergency. The Storm Whistle is the ideal choice for protection on the high seas! Storm Whistle is available in multiple colors.