The EOTECH EXPS3 Holographic Weapon Sight is a lightweight, non-magnifying, optical sight designed for close to mid-range engagements. It provides very fast target acquisition and engagement at short ranges while providing aiming capability out to 300 meters equal to or better than iron sights. The EXPS3 features easy-to-adjust side buttons, a quick-detach lever, and a transversely-mounted lithium CR123A battery. The increased height of the EXPS creates a lower 1/3 cowitness with iron sights. Free EXPS HexCap 2.0 Quick-detach lever compatible with 1” Weaver and MIL-SPEC Picatinny rails Powered by (1) CR123A lithium battery Runtime: 600 continuous hours at setting 12 at room temp 20 daylight settings with 10 night vision settings Submersible to 33 ft Length: 3.8” Width: 2.3”