Nikon ProStaff 1000i Laser RangefinderThe Nikon ProStaff 1000i Laser Rangefinder is a 6x20 monocular rangefinder with Nikon's ID Technology. ID stands for Incline Decline, and can display either Horizontal Distance or Actual Distance with a mode selection. This small, ergonomic rangefinder also has Nikon's Tru Target Technology which lets you select either First Target (the closest animal) or Distant Target (an animal deeper in the herd or behind some trees or bushes).