The MRO HD is optimized for use with a magnifier, with a re-engineered objective lens to produce a refined 2.0 MOA center dot surrounded by a 68 MOA segmented circle reticle. The ambidextrous reticle and brightness control allows the user to choose between a full reticle or center dot only.Features:Length x Width x Height: 2.9 in x 1.7 in x 3 in (73.66mm x 43.18mm x 76.2mm)Weight: 5.6 oz. (158.76g)Magnification: 1xObjective Size: 25mmDay Reticle Color: RedIllumination Source: LEDIllumination Settings: 16 TotalPower Source: CR2032Battery Life: 2.5 Years of continuous use at dot-only day setting "3" (Setting 5 of 8) at 70F (21C); 75 days of continuous use for complex reticle at day setting "3" (setting 5 of 8) at 70F (21C)Adjustment Range: 70 MOAEye Relief: Infinite in.Mount: Low MountHousing Material: 7075-T6 Forged AluminumFinish: Matte BlackSubmersion Depth: 100 ft. (30m)Operating Temperature: -60F to 160F (-51.11c to 71.11c)