*Quick Transitions-Simple, fast, and effective.*Durable & Compatible: Tough & shockproof, the hard-coat-anodized machined-aluminum construction ensures durability.*The lens are fully multi-coated maximizing resolution, light gathering capability, and color fidelity.558 holographic Red green dot dot +G3X 3xMagnifier Exit pupil distance: infinite Type of lighting: Level 20 luminance red and green mesh cables provide maximum flexibility in different lighting conditions Focus type: fixed Material: Aluminum alloy Easy to install and suitable for any 20mm track Elevation adjustment and view side lever Shockproof and weatherproof material Easy to install built-in quick detachable installation Battery :CR123A(NO excluding )