2pc Emergency Survival Whistle 2 Pack Metal Double Tubes Safety Whistles with Lanyard and Keychain for Hiking Hunting Boating Premium Quality: The whistle is made of high-quality aluminum alloy material, which is durable, not easy to fade, and has a long service life. Moreover, its surface is smooth, not easy to stick dust, more practical than other materials. Waterproof and anti-rust. High Decibel: This emergency whistle can provide up to 120 decibels, can be heard for far distances. The double tube metal whistle is extremely loud and easy to blow. A powerful high-pitched sound generator with dual-tone chambers, which can be used as a signal whistle very well. Distress Signal: The whistle has gold and silver, 2 different colors for you to use. double tubes emergency whistle can provide up to 120 decibels, enough to be heard at long distance Attracting attention in any emergency. If you lose contact with your friends on the mountain and there is no signal on the phone, you can whistle. The whistle can help you find your friends. Premium Quality Lightweight: Emergency whistle keychain design is perfect for use with house keys or car keys. Made with aluminum alloy, strong and durable, only 12g, with key chains and lanyard, can be tied to backpack, belt, or hanging around the neck as a whistle necklace. Widely Used: This survival whistle is very loud and very suitable for outdoor activities, such as schools, gyms, camping, fishing, hiking, pet training etc. It's also used for communication with companion in remote areas, calling for help in emergency. The whistle can be used not only for hiking, mountain climbing, boating, hunting, fishing, but also for dog training, school sports, coaching, etc. size5.6*1.5*0.8cm. colorsilvergold. pack*2.