Nikon's ProStaff Laser440 is pocket-sized, water resistant rangefinder that will accurately measure distance from 11 yards to 440 yards, with incredible 1/2-yard precision. This previously unobtainable level of precision is made possible by Nikon's original digital processor and quality 8-power optics, and will allow hunters to gauge distance more precisely for accurate shot placement-accuracy that is particularly meaningful to bowhunters. Because convenience, usability and portability are of paramount importance in a rangefinder, Nikon has designed the ProStaff Laser440 as a monocular-instead of the larger, heavier binocular-type unit. The monocular in the 440, however,features precisely ground and polished lens glass that is multicoated with anti-reflective compounds to provide maximum light transmission, clarity, and color rendition. The eyepiece is adjustable, with a range of +/- 2 diopters, and the unit has 10mm of eye relief. In addition, the ProStaff Laser440 has a real angle of view of 6.3 degrees, translating to a wide, 50.4-degree apparent angle of view and a field of view of 330 feet at 1,000 yards Nikon's ProStaff Laser440 measures ranges in yards or meters, displays in .5-yard increments out to 99.5 yards and one-yard increments beyond 100 yards, and features an automatic power shutoff after the reading has been displayed for eight seconds. An internal display shows the user how much battery power is remaining. The rangefinder measures 3.7" x 2.