Ueasy 7 In 1 Portable Multifunction Hiking Camping Outdoor Emergency Caution Survival Whistle Compass Thermometer Magnifier Viewfinder with White Led Flashlight Composed of thermometer,compass,storage warehouse,mirror,LED light,magnifying glasses. Material:ABS plastic Best for camping,outdoor survival,hiking on foot accessory. Standard military high decibel survival whistle, Refers to the North (South) needle, High precision thermometer, The survival of reflective signal mirror, Fire magnifier,Gao Baiguang LED flashlight, The sealing chamber, Nylon Lanyard, Battery replacement method