Advantages: 1. Made of aluminum alloy material ensures the whistle is strong and durable. 2. The surface is anodized for color formation, which is not easy to fade, exquisite, and beautiful. 3. Lightweight enough. With a keyring, portable and easy to carry. 4. The double tube whistle is blowing easily, providing a louder and clearer sound, that can be heard from a far distance. 5. No moving parts, water-resistance, that can use at all-environment all weather.
Instruction: This emergency whistle can be used for any type of outdoor activity. In addition, it can also be used as a referee's whistle, a dog's whistle, and a warning whistle for security personnel. It can be hung on the backpack and belt or can be hung on the neck with a rope so that you can whistle quickly.
Application: The high-frequency dual chamber resonance whistle is a common outdoor supply, it is small and easy to carry. Good for use when out camping, hiking, traveling, fishing, hunting, boating, etc.