StarBamboo BF6060 U.S. Army 60 X 60 Zoom Vision Optical Wide-Angle Telescope Night Vision Binoculars (Black) And coordinates calibration, outdoor hunting, mirror is the preferred product ruby coating. The brightness of the can increase the watch the scenery. Powerful zoom with different magnifications ideal for all outdoor activities and sporting events Shock-absorbing rubber armor High-quality multi-coated glass and K9 Porro Prism design,Precision aligned optics for extended viewing High quality ruby lens to minimize UV glareWith a strong optical lenses, LLL night vision function Strong waterproof shockproof function, comfortable and convenient to carry, you will love it Powerful zoom with different magnifications ideal for all outdoor activities and sporting events.The telescope is only visible under the dim light and doesnt work in night.