Ynport Outdoor Hiking Survival 7 in 1 Multi-Tool Emergency Whistle Compass Thermometer with Signal Mirror/Survival Rope/Magnifying Glass/Whistle/Compass/Thermometer/LED Fire Magnifier/Lanyard/Light 1.Features whistle, compass, thermometer, led light, magnifier, viewfinder, lanyard and storage 2.The standard military high-pitched survival whistle-------Internal sound-box patent design makes further and more shrill whistle. 3.Clear,high accuracy Compass!High precision thermometer! 4.Backup high light LED flashlight and your information sealed chamber. 5.Great for camping, hiking, hunting, fishing, outdoor activities, travel, emergency & survival kits, etc.