TI-EDC Titanium Emergency Whistle, Loud Portable Keychain Necklace Whistle for Emergency Survival, Life Saving, Hiking, Camping, and Pet Training HIGH QUALITY: Made of Titanium, resistant to corrosion, non-toxic, non-allergenic, lightweight and durable. MUTI-PURPOSE: The whistle is suitable for emergency survival, hiking, camping, traveling, pet training, sports, boating. VERY LOUD: This whistle is loud enough and can be heard from far distance. PERFECT SIZE: Length: 1.55, Outer diameter: 0.31, Weight: 0.17oz. Highly portable and fit perfectly on your keychain, necklace or backpack. Great for every day carry. GUARANTEE: lifetime warranty. Feel free to contact with us if you have any question about it.