1.Ultraloud 125dB sound ensures maximum . Our high quality brass emergency whistles produce a penetrating 110 decibel sound that is loud enough to be heard from a long distance. Whether you're getting lost in the wilderness, trapped in an emergency, or need to signal for help, this whistle cuts through noise, wind and rain. Our military grade brass construction delivers a consistent, earpiercing sound without failure. 2.DURABLE WATERPROOF Built for survival situations. Designed for harsh conditions. These whistles are waterproof and resistant to rust, corrosion and extreme temperatures. Whether you are kayaking, hiking in the rain or trapped in the storm, this whistle will remain fully functional. With no moving parts, won't jam or break, ensures reliability when you need it most. 3.SUITABLE FOR ALL AGES Perfect for , adults and seniors. yet durable, these whistles are great for all ages , adults and seniors alike. Their compact size (2.25' high x 0.5' wide) makes them easy to carry in a bag, backpack, or emergency kit. 4.MULTIPURPOSE Hiking, Survival, SelfDefense and More, Outdoor Adventure Essential for Hikers, Campers, Bikers and Hunters. Emergency preparedness A must have for earthquakes, floods or power outages. Selfdefense Deter potential threats with a loud, attentiongrabbing blow. Sports Coaching Ideal for referees, trainers and lifeguards 5.4 PACK VALUE SET Share with family and friends. Each order includes four high quality brass whistles, perfect for emergency kits, survival equipment and preparedness.