The durable, aluminum-bodied mepro rds reflex sight features a crisp 1.8 moa red dot and a large clear crystal display window for greater fov with both eyes open.Four brightness settings allow the shooter to adjust to changing light conditions.The technologically advanced on-off sensor shuts the optic off to preserve battery life when no movement is detected.One standard aa battery provides thousands of hours of use.It mounts to any picatinny rail and is compatible with nvgs and magnifying scopes.The mepro rds electro-optical red dot sight is rugged and reliable.The shockproof aluminum base displays extreme durability; energy-efficient, compact optic sight, providing thousands of operating hours from a single aa battery.4 selectable brightness settings: 3 for daytime, 1 for night vision with gen ii and gen iii nvgs, allowing you to adjust to changing light conditions.In ambiances of brighter light or subdued light, the mepro rds fits every tactical scenario.The mepro rds is equipped with unique energy-saving features such as the auto shut-off/auto power-resume function.The sensor shuts the optic off to preserve battery life when not in use.It automatically turns back on when in motion.Battery: AAMagnification: 1xObjective: 33 mm x 20 mm/ 1.3" x 0.79"Eye Relief: UnlimitedDot Size: 1.8 MOALength: 116mm/ 4.09"Weight: 300 g/10.60 ozFinish: BlackReticle: 1.8 MOA Red DotWindage Elevation: Adjustable