This high-frequency survival whistle is a must-have for earthquake . Its piercing sound can of chaotic environments, making it an invaluable tool for rescue teams and individuals alike. Attach it to your lanyard or keychain for easy access, and use it to signal for help when needed. The whistle's durable construction ensures it will perform reliably in any emergency. Features -Color:Black -Material:Plastic -Size:7.00X2.50X0.50cm/2.75X0.98X0.20in - sound transmission: the highfrequency sound of this whistle can travel long distances, quickly drawing attention in emergency situations -Versatile functionality: this whistle serves multiple purposes, including survival, lifeguard, and emergency uses, making it a practical tool -Convenient to carry: its small and lightweight design allows you to attach it to keychains or backpacks, ensuring it's always within reach -Built to endure: made from durable materials, this whistle is designed to endure various harsh conditions, providing reliability -Ideal for various scenarios: suitable for outdoor survival, earthquake rescue, wilderness exploration, and camping, this whistle is a musthave Package list: 30 x Whistle 30 x Lanyard