Model: HWO-SZ2 Main Material: Aluminum alloy and composite materials Brightness: Internal electronic adjustment Mounting Type: Standard 20MM Picatinny rail Battery: CR123A Mounting Method: Quick-release mechanism Parallax: Less than 3 MOA at 30 meters Reticle Color: Single red Product Dimensions: 7.6 x 4.5 x 5.8 cm Magnification: Fixed 1x, no magnification Product Appearance: Hard anodized aluminum