Product Specification: Premium Quality: Aluminum alloy material, strong and durable. Package: 2 x Survival Whistle with keychain Features: Loudest: 120dB very loud can be heard far away. Convenient: Emergency whistle keychain design is perfect for house or car keys, backpack, easy to carry. Survival whistles are lightweight and durable, a good helper for outdoor sports or training. Perfect for survival, camping, hiking, emergencies, lifeguards, sports referee, trainers, school, dog training, and sporting events.