Bresser True View Laser Range Finder Readout in yards or meters , 4X magnification, 21 mm objective lens 800-yd. range, 3.8 mm exit pupil, 12 mm eye relief Adjustable-focus eyepiece, 8-degree view angle; multi-coated optics LCD display; accuracy +/- 1 yard; includes nylon carrying case and lens cloth Uses (1) 9V battery (included), 4 3/4 by 3 inches; weighs 7 ounces