Folding Red dot reflex lens (22mm X 16mm). Folds down flat when not in use. With a push of a button the FlipDot lens flips up and automatically turns on. Objective lens diameter: 22mm X 16mm. Magnification: 1X. Reticle: red dot. Dot size: 3 MOA. Length: 2.0 in. Width: 1.2 in. Height: 1.1 in. Weight: 1.0 oz (without plate). Battery: 1*CR2032 battery. Flip up lens system deploys to the ON position with a push of a button. Turn off the optic by simply folding the lens down until it locks into place.