The AR-X 1x35mm Red/Green Dot Scope by Barska features 4 different illuminated reticle patterns which can be set to five different levels of brightness with the adjustable rheostat. This dot scope is equipped with a standard 5/8 mount that will fit a rifle's standard Picatinny Rails. Powered by an included 3V lithium battery. - 4 Illuminated Reticle Patterns - 5 Levels of Brightness - Standard Picatinny Rail Mount - Windage and Elevation Adjustments - Red and Green Illumination Options