Made of durable ABS plastic, the pea-less and powerful UST JetScream Micro Floating Whistle wilderness signaling device has an ear-piercing 112 decibel (dB) shriek — ideal for attaching to a key ring, backpack, personal flotation device (PFD), and more. It can easily be heard over most natural and man-made noises. The ultra-compact, flat JetScream Micro’s pea-less construction won’t freeze, clog or rust and is just as effective wet. Weighing just 0.1 ounce (3 grams), it measures 1.5 x 1 x 0.25 inches (30 x 25 x 6 mm). It’s backed by a manufacturer’s limited lifetime warranty.