Built with uncompromising precision and durability, Barska's Swat Tactical 30mm Riflescope delivers an excellent zoom range for engaging long-range targets. Fully multicoated optics ensure crystal-clear image clarity and color. The reticle's adjustable brightness levels and the glass-etched Mil-Dot combine to keep you on target in low-light conditions. Two buttons near the ocular lens control the illumination. One button activates the light and the other incrementally increases brightness. 1/8-MOA click adjustments. Side-adjustable parallax. Lockable windage and elevation adjustments. Nitrogen purged and entirely waterproof, fogproof and shockproof. Includes 5/8" high-set see-through rings, 5" sunshade and flip-up caps. One CR-2032 3-volt battery included. Manufacturer's limited lifetime warranty. Strong 30mm mail tube.