Twod Rifle Scope Tactical 6-24X50mm AOEG/3-9x40mm Optics Hunting Rifle Scope Red/Green Illuminated Crosshair Gun Scope + Covers + Free Mounts Magnification: 6-24X, Objective Diameter: 50mm, Tube Diameter: 25.4mm/1 inch. Field of view (m): 3.98~16.24, Click Value: 0~1/4 inch @ 100 yards. Eye Rifle (mm):75.94~81.53, Exit Pupil (mm):8.3~2.1. Illuminated Level: 5 Intensity (Red) and 5 Intensity (Green). Red or green dot crosshair with front focus eyepiece adjustment helps you shooting the target fast and accurately. Battery: CR2032 x 1 (Included). Eavy duty scope ring mounts for 20mm weaver rail only. Hard anodizing multi-coated lenses ensure a good hand feeling and avoid scratching. O-ring sealed, nitrogen-purged for waterproof, fogproof performance. Lens cover included.