Features: Our backpacking whistles are light in weight and portable, can easily put into your pocket, backpack, tote bag, gym bag or other places, without taking up too much space, easy to carry. The survival whistle is practical and functional, can send to your family members, relatives, neighbors and people who like outdoor activities, they will feel happy and grateful to receive them. Specifications: Material: acrylic, plastic, foam Color: as pictures shown Size: Mirror: about 3 x 2 inches Floating: about 3.3 x 1.5 inches Whistle: about 2.7 x 0.8 inches Package includes: 2 x Signal Mirror 2 x Float 2 x Whistle Notes: Manual measurement, please allow slight errors on size. The color may exist a slight difference due to different screen displays.Wide Range of Usage: our emergency mirror signal can be applied for various occasions, including but not limited to outdoor adventures, mountaineering, camping, hunting, fishing, extreme sports and more. Ingenious 4 in 1 Design: our emergency signaling device for hiking contains a total of 3 different functions, so there is a lanyard that holds them together, and you do not need to worry about losing them, providing you a lot of convenience. Serviceable Material to Use: the signal mirror is mainly made of quality acrylic, thick and reliable, not easy to break or deform; The emergency whistle survival loud is mainly made of plastic, solid and sturdy, smooth and textured; And the float is mainly made of quality foam, light but strong, serving you for a long time. Detailed Size Information: the signal mirror measures about 3 x 2 inches, the float measures about 3.3 x 1.5 inches and the hiking whistle measures about 2.7 x 0.8 inches, convenient for you to carry around. Abundant Quantity to Use: the package contains 2 pieces of survival mirrors, 2 pieces of floats and 2 pieces of boat whistles, adequate in quantity and complete in combination can satisfy your use and replacement requirements for outdoor survival.