558 : Magnification: 1 X Objective Lens Diameter : 0.85 In Eye Relief : Unlimited Focus Magnification Type : Fixed Type Illuminated: 20 Level Brightness Red And Green Reticle To Provide Maximum Flexibility In Different Lighting Conditions Illumination Type : Reflex Illumination Reticle Color : Red And Green Dot Brightness Settings : 10 Adjustment Click Value : 0.5 Moa Field Of View, Linear : 30 Yds At 4 In Resettable Windage And Elevation Adjustment Height Adjustment And View Of The Side Eevation Adjustment And View Of The Side Of Leverage Easy To Install And Setup, Integrated 5/8" 20Mm Rail, With Built-In Quick Detachable, Fits Any 20Mm Rail Material: Aluminum Alloy Aircraft Grade Lens Material : Optics Glass Lens Finish : Fog Resistant Internal Optic Optical Coating : Anti-Reflection Coating On External Surface Finish : Anodizing Coating Shockproof、Fogproof And Weatherproof Materials Function Key: Up Arrow Button: Power On And Increase Brightness Down Arrow Button: Power On And Reduce Glare Up And Down Arrow Keys: Off, Pressing The Keys Simultane Push Nv Button: Reticle Color Switching ( Red / Green ) G45: Magnification: 5X Objective Lens Diameter: 25 mm Angular Field of View: 7.28° (Degrees) Eye Relief: 2.6" (Inches) Linear Field of View: 23.3feet @ 100 yds Material: 6063 All-Aluminum Alloy Structure Size: 100*50*80MM Weight: 334.5g Mount Type: Any 1" Weaver or MIL-STD 1913 rail The G45 is Compatible with all Holographic Sight Models, Works with all Holographic Sights