New in open box Fits standard 20mm weaver and picatinny rails. 2.5-10x40mm Mil-dot Rifle Scope Dimensions: 8.5x3x3inches Weight: 20.5oz Magnification: 2.5x-10x Objective Diameter: 40mm Lens Color: Green Brightness Control: Red: 5 levels/Green: 5 levels Reticle Type: Mil-dot Exit Pupil: 16mm@2.5x, 4mm@10x Field of View: 100 yards of 32.5'@2.5x - 8.9'@10x Eye Relief: 101.6mm@2.5x; 76.2mm@10x Click Value: 1/4inch@100 yards Finish: Black matte Laser Power: 2mW Laser Frequency: 532nm Laser Reaching Distance: 100 yards Battery Type: 1 x CR2032 (illumination), 3 x LR1130 (laser) Click Value: 1/4inch@100Yds