LED red dot sight 1x magnification 30mm objective lens diameter 1 MOA (1" click value @ 100 yds) 3 MOA dot size Unlimited field of view Unlimited eye relief 6.80 oz. 3.15" long Incl. extra 3V lithium battery (CR2032), lens covers & mounting tool Other features: 7-position rheostat Multiple brightness levels Integral Weaver mount This red dot sight by NcStar can increase the accuracy of your favorite air rifle, airsoft gun or firearm. The red dot has multiple brightness settings that ensure an accurate shot under any lighting condition. The integral Weaver mount lets you mount this on any Weaver/Picatinny rail equipped gun with the help of the included mounting tool. Pick one up today!