Description: Premium Material: Made from titanium, this whistle is lightweight and sturdy, ensuring durability and longevity.Loud and Clear Sound: Ouutdoor survival whistle is designed to produce a loud and clear sound that can be heard over long distances. Compact and Portable: Titanium emergency whistle with lanyard, small and lightweight, making it easy to carry around. It can be attached to your backpack, keychain, or survival gear, ensuring you always have it on hand when you need it mostComfortable Use: The edges of the whistle are smoothly polished to prevent any cuts or discomfort when using it.Versatile Use: This whistle is designed for outdoor situations, hiking, camping, also great for sporting events, lifeguard duties, and training exercises. Specification: Material:Titanium Size Chart: 5.1 cmx0.7 cm/2.01 inchx0.28 inch Package Includes: 1Titanium Whistle Note: Please allow slightly errors due to manual measurement and different monitors.