Ezyoutdoor 7 in 1 Emergency Whistle Survival LED Light Compass Thermometer Flashlight Gymnasium Whistle Perfect for Camping Coaches Referee Hockey Survival 7 IN 1 - Includes: whistle, magnifier, flashlight, storage container, compass, thermometer & signaling mirror(Main function is whistle and others are auxiliary effect and not professionalhope you will understand) It with the lanyard,can hang onto your neck, wrist, gear, etc ;This survival tool is perfect for camping, hiking, or general travel Temperature range:- 20--+50C ;A button switch for LED light ;Include neck strap conveninet for carrying Measures 3 3/4" long 1 1/16"diameter.Lightweight, easy to use and reliable;Whistle in the wild whistle collection not only the role of life-saving effect Package included:1 x Emergency whistle;Lifetime Warranty;7-15 days shipping date with tracking number