Description:Micro Red Dot Reflex SightLightweight and compact， great for handgunsTubeless design， suitable for normal and rapid-firing shooting of moving targets.Switch for On/ Off Windage and elevation adjustable (tools included)Integrated mount for standard 20mm rails.Batteries are pre-installed for instant use out of box.  One extra battery is included for your convenience.SpecificationsDimensions:40mm (length) x 28mm (width) x 35mm (height)Weight:2.1 OZEye Relief: UnlimitedDot Size: 3 MOAColor: BlackPower: 1 x CR2032 What Included in the packageOne Tactical Micro Holographic Red Dot SightTwo hex wrenchesOne cleaning clothOne storage boxOne owner's ManualPackage Included??1*  Tactical Micro Holographic Red Dot Sight2*  hex wrenches1* cleaning cloth1* CR2032 Battery NOTE:As the effect varies from monitor to monitor， there is irrevocable slightly difference in colors between the color showed on your monitor and the real one， So if dear you can not accept this very little difference， be cautious before you making the orders.thanks for understanding.