HOLDALL Safety & Survival whistle Made from high impact plastic, with double frequency, it’s easy to emits a shrill, high-pitched sound, without having to strain to blow. With built-in clip and lanyard, it’s convenient to attach to clothing, school backpacks, bag, pocket, water gear or equipment for quick access. Great basic whistles to have as part of a go-bag or emergency kit, for camping, boating, hiking, biking, general survival all outdoor activities when you need to sound-off. Please do yourself a favor and buy a set of these to share with your friends. Hope we never need to use them in an emergency, but handy to keep it with your survival kit. A small price to maybe save a life!NO WORRY SERVICE, every purchase includes our worry-free service and persistent support. If you have any questions, our friendly customer service team will be more than happy to help out. UTILITY CLIP & LANYARD, extremely convenient attach to life vest, beltloop, kayak PFD, sailboats, hiking gear, kids jacket, backpack shoulder strap. TWO SOUND CHAMBER, up to 120 decible, great noise maker, easy to be heard over 1 mile. PEALESS DESIGN, no moving parts inside, won't freeze like METAL ones in cold environments. NON BRITTLE WHISTLE, brightly colored-high visiable, easy to locate if misplaced, a great safety tool.Date First Available: May 30, 2017. Best Sellers Rank: #54,592 in Sports & Outdoors. Customer Reviews: 4.5 out of 5 stars 442 ratings 4.5 out of 5 stars. : B072JGHD4K. Size: ?4 set. Part Number: ?H-W-001. Manufacturer: ?HOLDALL. Number of Items: ?4. Suggested Users: ?People. Material: ?Plastic. Color: ?Red, Yellow, Green, Orange. Model Name: ?HW-4P-YRBO. Warranty Description: ?Lifetime. Brand Name: ?HOLDALL. Item Weight: ?0.42 Ounces. Item Dimensions LxWxH: ?2.83 x 0.69 x 0.79 inches. Package Weight: ?0.06 Kilograms. Item Package Dimensions L x W x H: ?5.67 x 4.21 x 0.98 inches.