1. A multi-functional item that can be used as an emergency whistle, compass, led flashlight, magnifying glass, retroreflector, thermometer, and sealed cabin.2. Suitable for outdoor activities, a survival whistle should be equipped for safety reasons. Perfect for camping, hiking, or traveling in general.3. Design clever, small size, easy to carry. It is a necessary tool for survival.4. Using the theory of reflection the magnifier helps you start a fire. Contact with peers in the wild, danger, accident needs help.5. Original with a lanyard, field activities hanging in the neck is very convenient! Is a camping adventure, tourism, and leisure essential supplies.