Product Description Hardcoat Anodizing Type III Nitrogen Filled Auto Sleep Mode / Auto Awake Auto Off Low-Battery Alarm NVD Compatible 1000G Shock Proof IPX8 Waterproof 36000 Hours Battery Life Optical Light Source: LED Reticle: 2 MOA Dot | Red Objective Lens: 21mm Magnification: 1X Parallax Setting: ≤2MOA at 30 yd Eye Relief: Unlimited Fog Proof: Yes Lens Coating: Anti-reflective, Anti-fog, Scratch Resistant Mechanical Housing Material: AL 6061-T6 Housing Color: Black Nitrogen Filled: Yes Surface Finish: Hardcoat Anodizing Type III Adjustment per Click: 1 MOA Waterproof: IPX8 Shockproof: 1000G Storage Temperature: -35C-75C Operational Temperature: -25C-50C Mounting Style: Picatinny Electronic Battery Type: CR2032 Battery Voltage: 3V Battery Life: Brightness Setting 3 - 66,000 Hours, Brightness Setting 4 - 36,000 Hours Brightness Setting: 9 Daylight + 2 NV Physical Dimension: 2.53 x 1.62 x 1.85 inches Weight: 4.16 oz Central Height: 0.65 inches WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov/product Customer Reviews