30mm Tube with Emerald lens coatings to achieve maximum light transmission and clarity. Built on True Strength Platform, completely sealed and nitrogen filled, shockproof, fogproof and rainproof. Innovative EZ-TAP Illumination Enhancing (IE) system with red/green in dual-color mode and 36 colors in multi-color mode to accommodate all weather and light conditions. 1-Click technology for quick access to your favorite color and brightness in reticle. Premium zero lockable and zero resettable target turrets with consistent and precise 1/4 MOA per click adjustment. Parallax preset at 100 yards. Mil-dot range estimating etched glass reticle with built-in integral sunshade for optimal aiming and shooting performance. Complete with UTG max strength Picatinny/Weaver rings and high quality flip-open lens. Magnification: 1.50X - 6X Tube Diameter: 30mm Objective Diameter: 44mm Field of View @ 100 yards: 57.6' - 17.3' Eye Relief: 3.9" - 3" Exit Pupil: 17.2mm - 7.3mm Click Value @100 yards: 1/4" Length: 13.20" Weight: 22.8 oz Parallax Setting: 100 Yds - Infinity Batteries: CR2032 3V