Built on the industry-standard RMR footprint, the enclosed Olight Osight XR Red Dot Sight delivers rugged protection and broad pistol compatibility. With the industry's first collapsible backup rear sight, a rear sight deploys instantly at the press of a button, providing a dependable backup aiming solution when the optic is powered off.The patented magnetic charging cover powers the optic while displaying real-time battery levels for both the cover and the sight, delivering innovation you can see - and power you can trust. FeaturesMotion Activated IlluminationParallax Free Aspherical Lens (0.91" x 0.71")Collapsible Rear Iron SightInsutry First 2/6+32 MOA Multi-Reticle SystemMagnetic Charging CoverEnclosed EmitterEasy InstallationTested to 10,000 Rounds of Live Fire