The hro (heavy recoil optic) is the next generation of quick acquisition tactical reflex sights.Packed with best-in-class features like ct motion shake-to-wake sensor and integrated picatinny rail mount, the hro looks good and performs even better.Features auto shutoff, sight will shut off after 8 hours of use.Features full cowitness for iron sights.Battery: (2) CR2Magnification: 1xObjective: 36.5mm x 27.8mmField Of View: UnlimitedEye Relief: UnlimitedDot Size: 2 MOALength: 3.38"Weight: 8.50 ozReticle: 2.0 MOA Red DotAdjustment Size: 0.50 MOAProofs: IPX7 WaterproofOptic Coating: Fully Multi-CoatedWindage Elevation: Adjustable