FOYTOKI 3pcs Signal Mirror Outdoor Retroreflector Emergency Mirror Reflective Manual

Signal mirror: when the weather is clear, the optical signal transmission distance can than 100 kilometers,sunny day.
Emergency mirror: with aiming function, signal transmission is accurate and fast,survival signal.
Outdoor accessories: there is a manual on back side which show you how to use this mirror,marine signal mirror.
Survival mirror: suitable for outdoor activities and emergency uses, camping, hunting, skiing,reflector.
Signal mirror: it is suitable for long-distance communication in the field and sending signals for survival,signaling mirror.