?Sufficient Quantity: package includes 10 pieces of aluminum emergency whistle, don't worry about losing, enough for you to use in daily life, including 7 different colors, eye-catching and bright, easy to find. Matching Key Ring: each emergency whistle is equipped with a round key chain ring, compact and strong, elegant personality, can be hung on the key ring as an ornament, portable design, easy to carry around. Loud Whistles: aluminum alloy outdoor survival whistle can make big and bright sound, which can be heard from a long distance, very useful for various emergency situations; During outdoor travel, you can confirm the direction for you, avoid getting lost, find companions, etc. Dimension: these loud whistles measure approx. 5cm/ 1.97 inches in length, diameter of the these whistles is approx 0.5 cm/ 0.2 inches, suitable size for your use and storage. Durable Material: these emergency whistles are made of aluminum alloy and metal key ring, durable and non-toxic, not easy to break, fade or corrode, can serve you for a long time.Date First Available: June 15, 2022. Best Sellers Rank: #45,722 in Sports & Outdoors. Customer Reviews: 4.5 out of 5 stars 2,101 ratings 4.5 out of 5 stars. : B0B45QSRGV. Size: ?NO. Included Components: . Part Number: ?1. Manufacturer: ?Woodcovo. Suggested Users: ?( ?). Material: ?. Color: ?Multicolor. Model Name: ?1. Warranty Description: . Brand Name: ?Woodcovo. Package Weight: ?0.17 Kilograms. Item Package Dimensions L x W x H: ?6.02 x 3.35 x 0.63 inches.