Switch from green dot for low light, to red dot for bright light. Super bright, extra wide FOV, illuminated 5 MOA dot with 11 position rheostat. For shotguns up to 3' shells and handguns up to .357 magnum. Magnification 1x Field of View 62 ft. at 100 yd. Lens Coating Rubicon multilayered, fully coated Focus Type Fixed Parallax Setting 50 yd. Objective Lens Diameter 42 mm Eye Relief Unlimited Reticle Type Illuminated 5 M.O.A RedGreen Dot, 11 position Rheostat WindageElevation .5 at 50 yd. Tube DIA 47 mm Weight 6.7 oz. Length 3.75 in. Finish Black Matte Built on dovetail rail to fit standard centerfire weaver style bases