"The Osight X Rechargeable Circle & Dot Red Dot Sight is an advanced reflex sight featuring OLIGHT's revolutionary Magnetic Charging Cover, multi-reticle system, and an incredibly wide field of view. The Magnetic Charging Cover charges the unit in real-time while providing battery level readings for both the optic and Cover itself. The Osight X provides up to 77,000 hours of runtime at level 3 (dot only) and up to 308,000 hours total runtime with the Magnetic Charging Cover at full charge, giving you enough juice to always be ready for action. For targeting versatility, the Osight X Red Dot features a 3 MOA dot along with a 32 MOA circle that can be used together or separately to give you the ideal sight picture for any scenario. Adaptive auto-brightness matches the dot to ambient light conditions but can also be adjusted manually to 10 daylight and 2 night-vision brightness settings. The optic features a large 0.94x0.85"" window with multi-coated optics for a nice, bright sight picture with optimal peripheral detail for easy target acquisition. The unit is made from proprietary OAL aluminum alloy that's almost as light as 7075 aluminum but significantly stronger. Industry-standard 407c/507c footprint. Includes charging cable, mounting hardware, pouch, and cleaning cloth. Magnetic Charging Cover provides simple field charging Up to 308,000 hours of runtime with Magnetic Charging Cover at full charge Cover shows battery levels for both the unit and Charging Cover Multi-reticle system: 3 MOA dot and 32 MOA circle can be used together or separately Auto-brightness control with 10 daylight and 2 night-vision manual settings Large 0.94x0.85"" window with multi-coated optics OAL aluminum alloy construction Industry-standard 407c/507c footprint"