The konus atomic-r is a lightweight and compact red dot sight with tactical turrets.Features dual mount suitable for 7/8" and 3/8" rail, 11 reticle brightness settings and unlimited eye relief.Includes cr1620 battery.Battery: CR1620Magnification: 1xObjective: 20mmField Of View: 35.10-10.70 ft @ 100 ydsEye Relief: UnlimitedDot Size: 3 MOAFinish: BlackReticle: Illuminated Red DotAdjustment Size: 1 MOAProofs: WaterproofWindage Elevation: 30 MOA