The EOTech EXPS3-1 Holographic Weapon Sight is an excellent choice for professionals. The EXPS3 offers true two eyes open shooting for fast target acquisition, night vision compatible settings, and a 7mm raised quick detach base for lower 1/3 iron sight co-witness. IncludedHWS EXPS3Quick-Start GuideWarranty CardCR123 BatteryProtective Case Features20 daylight settings10 additional settings for Gen I through III+ night vision devices1,000 continuous hours at nominal setting 12 at room temperature-40AdegF to 140AdegF (-40AdegC to 60AdegC)