Features: When the weather is fine, the optical signal transmission distance can reach more than 100 kilometers; Available even when on a cloudy night. Usually used as a mirror. Great for outdoor long distance communication, sending reflective survival signal. Enable you to aim the target, fast and precise signal delivery.
Specification: Size: approx. 57 X 57 X 7 mm/2.24 X 2.24 X 0.28" Material: Acrylic Weight: approx. 35 g