LARGE OPEN REFLEX SIGHT. CT RAD MAX. Large function buttons for brightness settings. M1913 Pic Rail Mount – Fits most MIL-SPEC Pic Rails – Low profile pic rail mount included. Recessed optic lens for increased durability. Adjustable windage and elevation – aerospace aluminum construction – IPX7 waterproof – Rubber sight cover included – Top access battery location. (1) CR2032 battery included – 50,000 hours of runtime – 3 MOA dot – Auto Shutoff Function – Sight automatically shuts off after 8 consecutive hours of operation to conserve battery life – Manual ON/OFF function to conserve battery life. Mfg: Crimson Trace Corporation