Made of durable ABS plastic, the pea-less and powerful UST JetScream Floating Whistle is an ideal wilderness signaling device with 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. Compact, flat, and buoyant, the JetScream?s pea-less construction won't freeze, clog or rust and is just as effective wet. 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.The JetScream Floating Whistle is one of the loudest of its kind. At 122dB, it can be heard over most natural and man-made noises.