The UTG 4-16X44 30mm Compact Scope Features 30mm Tube with Best in Class Multi Emerald Coated Lenses to Achieve Maximum Light Transmission for Best 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 Dual-Color Mode and 36 Color Multi-Color Mode to Accommodate All Weather/Light Conditions U.S. Pat. 8,437,079; EU Patent Pending 1-Click High-tech Illumination Memory Feature Gets You Right Back to the Color/Brightness Setting Last Used Premium Zero Locking and Zero Resetting Target Turrets with Most Consistent and Precise 1/4 MOA per Click Windage/Elevation Adjustment Side Wheel Adjustable Turret for Parallax Adjustment from 10 Yards to Infinity; Side Wheel Ready for Optional Big Wheel to Achieve Finer Parallax Adjustment TactEdge Angled Integral Sunshade, complete with Flip-open Lens Caps and High Quality Max Strength Quick Detach Pica Leapers Inc. UTG 4-16x44 30mm Compact Scope; 36-color UTG 4-16X44 30mm Compact Scope;36-color