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 Picatinny/Weaver rings. Specifications: - magnification: 4 - 16x - tube diameter: 30mm - objective diameter: 44mm - field of view at 100 yards: 26.2' - 7.85' - eye relief: 3.4" - 3" - exit Pupil: 11.0mm - 2.7mm - click value At100 yards: 1/4" - length: 283mm - weight: 21.8 oz - Parallax setting: 10 yds - Infinity - batteries: CR2032 3V.