GOGO 10 Pcs Metal Police Whistle Scout Guide Whistles Emergency Survival Whistle PACKAGE & DIMENSION --- Price is for 10 pieces; Package: 1 piece / individual plastic box. Whistle Size: 2-1/2 x 4/5 inch; Box Size: 3-1/3 x 1 x 5/7 inch. HIGH QUALITY MATERIAL --- 100% made of high-grade steel; Nylon detachable neck lanyard; Metal lanyard ring. Safe, durable and sturdy to use. LOUD SOUND--- Whistles are just easier to use. Super loud and clear tone shrills when blown. 3-chamber produces piercing decibel levels that can be heard above crowd noise, breaking waves & thundering gale-force winds. No cork ball, No "over blowing" and no more moisture and germs being absorbed into the cork surface. CONVENIENT TO CARRY --- Comes with a lanyard, you can carry it easily and convenient. The lanyard of the plastic whistle is attached by a metal ring. You can wear it around your neck. And it can be easily attached to keys, ID badge reels or belt clips etc. Keeps it securely in place while wearing during any activities like coaching, refereeing, or lifeguard. MULTIPLE USES --- These whistles are suitable for referees, coaches, training, teachers, lifeguards, self-defense, survival, emergency, herding, training bird or dog, gym, school sports training, basketball, soccer, football and other sports, or anyone who needs a safety whistle. Also fit for Law Enforcement, Park Rangers, and Emergency-Hiking-Survival for outdoor activities.