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.