"Bushnell's compact 800 rangefinder is a precision instrument that calculates distances with a ranging accuracy of plus or minus two yards. Features targeting modes, unit of measurement in meters or yards, low battery indicator, and liquid crystal display.Magnification 8x. Field of view 4.6 degrees. Exit pupil 3.4 mm. Eye relief 12 mm. LED backlight. PermaFocus® monocular optical system. Uses 4 AAA batteries (not included). 4-5/8x3-3/4x2"". 9.4 oz. Refurbished, like new. 2nds. China."