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: Mateiral: Titanium Dimension: S 3.8cm * 5mm L 4.25mm * 7mm Cord Length: 45cm+5cm Weight: 4g / 7g Package List: 1 * Whistle