ATN Compact Digital Ultra Sight Heads up, rapid acquisition reflex sight is half the size of ATN's standard sights but with a similar feature set Digital controls allow shooter to select between three reticle patterns with push of a button, without any "reticle shift" when pattern is changed Brightness control is built in and automatic, adjusting on its own to suit lighting conditions 1X magnification, Proshield lens coating, and 22-millimeter exit pupil; 1/2 MOA windage and elevation adjustments; measures 1.2 by 2.1 by 2.7 inches (W x H x D) with seven-ounce weight Includes limited two-year manufacturer's warranty