Specification: 1. Product name: High Decibel Outdoor Life-saving Emergency Whistles 2. Food hygiene grade stainless steel manufacturing 3. Field rescue whistle tool 4. Size: 58mm*18mm 5. Color: Dark gray, Black Features: 1. Loud, Up to 150db, Spread further 2. Whistle Inclined smooth and evasive whistle hole 3. Used to sports events, ask for help, Training pet ect Package Included: 1*whistle