30mm Tube with Best in Class Emerald Lens Coatings to Achieve Maximum Light Transmission for Best Clarity Built on True Strength Platform, Completely Sealed and Nitrogen Filled, Shockproof, Fogproof and Rainproof Mil-dot Range Estimating Reticle for Most Optimal Aiming and Shooting Performance Innovative EZ-TAP Illumination Enhancing (IE) System with RGB in Dual-Color Mode and 36 Colors in Multi-Color Mode to Accommodate All Weather/Light Conditions Premium Zero Lockable and Zero Resettable Target Turrets with Most Consistent and Precise 1/4 MOA per Click Adjustment at 100 Yards Side Wheel Adjustable Turret (SWAT) for Parallax Adjustment From 10 Yards to Infinity Built-in Integral Sunshade 1-click High-tech Memory Feature remembers Your Favorite Color/Brightness Setting Complete with UTG RG2W3154 Max Strength Picatinny/Weaver Rings and High Quality Flip-open Lens Caps Magnification: 10X Tube Diameter: 30mm Objective Diameter: 44mm Field of View @ 100 yards: 11.4' Eye Relief: 3.2" Exit Pupil: 5mm Click Value @100 yards: 1/4" Length: 270mm Weight: 21.9 oz Parallax Setting: 10Yds - Infinity Batteries: CR2032 3V