Super Loud Emergency Survival Whistle: The double-tube design makes it easy for even children to blow. It emits a loud sound of up to 120 decibels and can be heard from afar. Quality and Durability: This survival whistle is made of durable and robust stainless steel. It is very lightweight and easy to carry. Waterproof: Based on metal material and professional design, this whistle can be used in all weather conditions without affecting the sound or decibel level. Convenient Keychain Function: It comes with a keychain, so you can carry it with you, hang it on your backpack, belt, around your neck, or store it in your bag for emergencies. Wide Application: This emergency whistle can be used in a variety of situations, such as camping, hiking, mountaineering, fishing, boating, hunting, team activities, and dog training. It is also suitable for most people, including the elderly, men, women, children, and sports referees.