UST Jetscream Floating Whistle
Be heard with the UST JetScream Floating Whistle. This whistle is made from durable ABS plastic and thanks to its pea-less design works just as well when wet (it floats!).
It has an ear-piercing 122 decibel (dB) shriek -- making it one of the loudest of its kind. It can easily be heard over most natural and man-made noises.
Weighing just 0.4 ounces (10 grams), it measures 2.25 x 1.3 inches (LxW). It's backed by a manufacturer's limited lifetime warranty.