Durable material and proper size: made of quality acrylic material, the signal mirror is sturdy and durable, not easy to crack and fray, with strong toughness and better reflective effect, it is great for outdoor occasions; The mirror is approx. 3 x 2 x 0.22 inch Wide range of application: the multifunctional signal survival mirrors can be widely applied for various occasions, such as cars, outdoor adventures, mountain climbing, camping, hunting, fishing, extreme sports and so on, and they can be applied as useful outdoor distress tools, tools that whistle for help, compass, etc. Multifunctional and practical: the small signal mirrors adopt built-in precision aiming system, which is great for outdoor survival activities, long-distance communication in the field, sending reflective survival mirror signal, etc.; With accurate and fast signal transmission, the light signal transmission distance can reach several kilometers on a clear day; The mirrors can be applied normally on cloudy days or at night when there is light, and can also be applied as mirrors at ordinary times Great for outdoor survival: the signal mirror is essential for outdoor survival activities, one of the five major elements of outdoor survival is the signal generating device; Most people who engage in remote outdoor activities will agree that carrying a survival mirror is necessary Signal mirror protective design: designed with a protective film on the signal mirror surface, it can prevent the mirror from being scratched; And the signal mirror with a plastic box packaging can provide the mirror with a good protection, while it is convenient to store; Note: please remove the protective film on the mirror before use