DescriptionThis whistle made of aluminium alloy which strong and durable. And the whistle is designed to give you the best chance for survival in a disaster or lift-threatening situation. It's carabiner keychain which you can tie it on your backpack or belt.Features- Color: Random color. - Material: Aluminium alloy. - Size: 9.2x2.5x0.5cm/ 3.62x0.98x0.19 inch. - Strong and durable, aluminium alloy material ensures the whistle durable. - Convenient and practical,with kering and carabiner keychain,can tie on your backpack,belt. - Lightweight and equipped with key chain, easy to carry. - Made of aluminum alloy, the surface adopts anodic oxidation technology for color forming, which is color-fast and has a longer service life. - Water-resistance camping whistle: Be used in all-environment all-weather, rainy day, humid weather with excellent airflow design. - The whistle is an essential piece of safety equipment to have on you during outdoor activities.