Fenix GC Stainless Steel Outdoor Life-saving Emergency Whistle NW20 Fenix Whistle is designed for Life-saving in Emergency The max voice 120 DB NW20/NW30 Whistle is without pea ,you have no worry about dirt and water contaminate the chamber. It may work in any bad environment. Produced by Food Grade 304/304L Statinless steel, Safty confirmed. Fenix whistle will do help in emergency,Saving 30% energy to reach the same DB than normal whistle Simple and Elegant look, reliable quality