Features: 1. Standard military-regulated high-decibel survival whistle (the patented design of the sounding inner chamber makes the whistle farther and harsher). 2. Compass (high accuracy, clear at a glance). 3. High-precision thermometer (Faster and more accurate to grasp the current temperature in the first time). 4. Survival reflective signal mirror (Using the principle of sunlight reflection to search for and rescue personnel forward to explain their current location). 5. Tinder magnifying glass (When there is no flame in the wild, you can use the principle of sunlight focusing on the magnifying glass to refract the sunlight to the dead grass and leaves to produce flame, which is better than drilling wood to make flame). 6. High white light LED flashlight (Under the premise that there is no bright light in the field, the lighting system for emergency use, the life of the LED bulb is 10,000 hours). 7. Sealed storage warehouse (You can put your own life-saving strip in it before you travel; you can write your name, address, phone number, blood type, etc. So that rescuers can grasp your situation for the first time). 8. Nylon lanyard (more convenient to carry around). Specifications: Size: about length 9.8cm*diameter 3cm/3.86x1.18inch Weight: about 50 grams Material: ABS high-strength anti-fall and high-temperature engineering material Function: multifunctional survival whistle, pointing (south) north needle, LED light, magnifying glass, mirror, thermometer, storage bin. Packing List: 7 in 1 Whistle*1 Note: 1. Due to the problems of lighting effects and shooting angles, please make sure to allow product tolerances. 2. Due to manual measurement, the product has a certain dimensional tolerance. 3. Due to the difference between the light source and the screen, the color of the actual product and the color of the picture will be slightly different, please compare with the actual product.