Features: 1. The whistle is stable and durable: high-quality aluminum alloy material, oxidized surface and sandblasting effect, not easy to fade and long service life. 2. Outdoor whistle double tube design: the volume can reach 120 decibels, loud sounds can be heard from a long distance The whistle is high. 3. Wide Range of Applications: This whistle is very suitable for outdoor camping, hiking, boat fishing, emergency survival, and can also be used for school sports games and rescue rafting. Description: This product is a whistle, high-quality aluminum alloy material, oxidized surface and sandblasting effect, not easy to fade and has a long service life. Specifications: Material: Aluminum Alloy Peak Volume: About 120db Surface Treatment: Oxidation + Sandblasting Size: 55*15*8mm Color: Silver + Gold + Black Package Included: 3*Whistle (Opp Bag) Notes:1. Please allow 0-1 inch error due to manual measurement. Thank you for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object.