Sentinel ii is equipped with a precise 3 moa red or green dot reticle presented within a viewing window measuring 20mm in width and 17mm in height.The 3 moa dot translates to 3 inches at 100 yards which provides an accurate aiming point, enhancing precision even when using subcompact pistols.Battery Size: CR2032Magnification: 1xEye Relief: UnlimitedDot Size: 3 MOALength: 1.84"Weight: 0.99 ozProofs: IPX7 WaterproofOptic Coating: Fully Multi-Coated/Anti-Fog/Hydrophobic