Specifically designed for tactical applications with a choice of dual color reticle illumination, or just black Mil-Dot reticle. This enables the user to determine the distance of objects of a known size. The reticle is also useful for providing quick trajectory and wind drift aiming reference. The model with the illuminated reticle has an adjustable rheostat for brightness control. Also featuring Weaver-style rings, rubber eye guard, waterproof, fog-proof, and nitrogen gas-filled. They have a generous 4 eye relief and the lenses are fully coated for maximum brightness, clarity and contrastSpecifications:- Magnification: 4x - Objective: 32mm - Field of View: 22.5 ft @ 100 yds - Eye Relief: 4 - Tube Diameter: 1 - Length: 9.8 - Weight: 13.1oz - Finish: Black - Reticle: Illuminated Mil Dot - Adjustable Size: 1/4 MOA @ 100 yds