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. Cord Length: 415mm / 16.3in. Weight: 6g / 0.2oz. Package List: 1 * Whistle