GOHIKING Tactical Multi Optical Coated Holographic Red and Green Dot Sight Tactical Reflex 4 Different Reticles 100 characters per line and each line will be displayed as a separate bullet point Integral Weaver-Picatinny Rail Base for easy mount on guns,unlimited eye relief & wide sharp field of view. Windage & elevation adjustments with reticle lock of aircraft grade aluminum alloy. Multi-protection: Shock proof,fog proof,water resistant ideal for military-law enforcement-hunters.Wide sharp field of view of 12 months warrenty and easy-to-touch support. Power: 1X ;Obj.aperture: 1.3'' ;Field o.V.: 15.8m@100m ;Output: 1mw ;Battery: 1xCR2032 ;Housing Size: about 3.2'' x 2.1''X 2'' ;Reticle selector;Tube diameter: 1.2''