Ranging out to 850 yards is no problem, thanks to this HD range finder with 6X magnification, 21mm glass lens, and both scan mode and angle measurement and compensation. IPX4-rated waterproof ABS housing with durable rubber trim. Product Information: 850 Yard Range Minimum Range of 8 Yards 6X Magnification 21mm Glass Lens IPX4 Waterproof Durable rubber trim Yard/Meter selection Scan Mode Angle measurement & compensation Battery Indicator Lens Cloth Powered by 1 CR2 battery (included)