This titanium whistle is lightweight and corrosion-resistant. It is very loud to make yourself heard from far distance. It is great for outdoor activities. Features: Titanium construction, extremely lightweight. Corrosion-resistant and durable. With a cord for easy carrying. Loud enough and can be heard from far distance. Suitable for emergency survival, hiking, camping, traveling, pet training, sports, boating, etc. Specifications: Material: Titanium, Dimension: 55 * 8mm / 2.2 * 0.3in, Weight: 9g, Package List: 1/2 * Whistle