The EOTech Model EXPS3 Weapon Sight features an innovative design that allows for true two-eye shooting, 7mm raised base still allowing iron sight access. Plus, easy to adjust side buttons an an adjustable, locking quick detach lever for easy attachment and removal. EOTECH Two Dot Reticle - their two-dot reticle pattern can be easily distinguished with or without magnification and offers the benefit of an additional long-range, aiming dot. The aiming points above are based on the following load: .223 cal. 62 gr. 2,900 vel. For ordering this reticle, the model codes will end in -2. Battery Life: Approximately 600 at nominal setting 12 at room temperature Included in the box: HWS EXPS3(TM) Quick-Start Guide Warranty Card CR123 Battery Protective Case