Nikon's advanced ID (Incline/Decline) Technology allows hunters to range targets from a treestand down into a canyon or in other steep terrain with the same confidence and ease as ranging over flat ground. Compensates for various shooting angles up to an incredible + or - 89° (nearly vertical up or down!). The Archer's Choice rangefinder is designed specifically for archers, with Nikon's® advanced ID Technology to be the ultimate rangefinder for bowhunters. The result of Nikon's collaboration with the pros at Archer's Choice, this rangefinder offers two-yard increment distance readings and all the features serious bowhunters demand. Nikon's advanced ID (Incline/Decline) technology compensates for various shooting angles and provides equivalent horizontal range to the target. It all works together to help bowhunters shoot with confidence from the treestand or on steep, uneven terrain just like it was flat ground. The Archer's Choice also features multicoated optics, waterproof/fogproof ruggedness, and pocket-sized portability. Comes with Realtree APG HD® camo neoprene case. Weight: 6.3 oz. Range: 5–100 yards. Runs on CR-2 lithium battery (included). Features: Rangefinder made just for bowhunters Distance readings in two-yard increments Nikon ID (Incline/Decline) technology Multicoated optics Waterproof/fogproof Comes with camo neoprene case Range: 5-100 yards Manufacturer model #: 8366.