4-12X50EG Optical Rifle Scope with Mounts & Accessory RailsThis tactical rifle scope is well suited for mid to long range shooting, with high optical clarity at 4-12X times magnification and a 50mm objective diameter. The reticle is illuminated in red or green and in multiple brightness intensities, for a suitable sight picture regardless of lighting or environment. The integrated 20mm tri-rail provide ample space for attaching multiple accessories. Durable all metal construction Complete controls Fully coated lens Weather, shock, and fog proof Integrated mount for any 20mm rails (Picatinny or Weaver) Integrated tri-rail for conveniently adding accessories Specifications Dimensions: 13"(length) x 2.5"(width) x 3"(height) Weight: 25 oz Magnification: 4x-12x Obj. Diameter: 50mm Brightness Control: Red : 5 levels / Green : 5 levels Reticle: Rangefinder Exit Pupil: 10mm @ 4x; 3.3mm @ 12x Field of View: 10' ~ 27' @ 100yards Eye Relief : 3" ~ 3.4" Windage & Elevation Click Value: 1/4' @ 100 yards Power: 1 x CR2032 (included) Spare batteries are included for your convenience.Items Included One C4-12X50EG illuminated rifle scope (Rangefinder reticle) Lens caps One cleaning cloth Two CR2032 batteries (one spare)