Three Brightness Settings 3 Different Colors (Blue, Red, Green) Finger Adjustable Elevation and Windage Turret Waterproof, fogproof, and shockproof High quality coated lens Fits picatinny and weaver rails 1 CR2032 battery included In the Box Red-dot optic Specifications: Material MetalColor BlackLength 4 InchesWeight 9 ozParallax setting 50 yardsField View 68 ft at 100 yardsObjective lens 30mmEye Relief UnlimitedReticle 5 MOA California Proposition 65 Warning: Cancer and Reproductive Harm - www.P65Warnings.ca.gov