BARSKA 4-16x50 IR AO Excavator Target Dot Riflescope Riflescope with 11 rheostat brightness settings, specifically designed for big game hunting and long-range target and varmint hunting 4-16X magnification, 50-millimeter objective lens, and one-inch tube diameter; 19.9-foot field of view at 100 yards at 4X and 5.8-foot field of view at 100 yards at 16X; 12.5-to-3.1-millimeter exit pupil and 3.5-inch eye relief 14.6-inch length and 20.8-ounce weight; 0.125-inch click value on adjustment knobs for windage, elevation, and rheostat; fully multi-coated optics and infrared target dot reticle; water-, fog-, and shock-proof; black matte finish Comes complete with flip-up scope caps, a three-inch sunshade, two mounting rings, a lens cloth, and battery Includes limited lifetime manufacturer's warranty