Description: The front sight signal mirror is an option in any survival emergency kit. One of the five major elements of outdoor survival is the signal generating device. Survival experts all over the world have a consensus that anyone should carry a front sight signal mirror and a survival whistle when engaging in remote outdoor activities. Specification: Product Name: Signal Mirror Size: 57*57*7mm (reflection mirror) Color: As picture Material: Acrylic Features: It is especially suitable for long-distance communication in the field and sending reflective survival signals; With aiming function, signal transmission is accurate and fast; When the weather is clear, the optical signal transmission distance can reach more than 100 kilometers; It can also be used normally when it is cloudy or at night when there is light; It can be used as a mirror at ordinary times; Package include：1 X Outdoor Signal Mirror Note: Please allow slight dimension difference due to different manual measurement. Please note that slight color difference should be acceptable due to the light and screen.