Features:- Constructed by aluminum alloy with anodized matte black processing. - Light weight and compact design， water resistant and shockproof.- Anti-glare reflective coated lenses that gives good optical clarity. - Tubeless design with 22 x 33mm apertures reflex lens， provides a wide field of view.- A 3-position rheostat illumination(Red and Green). - Installed 4 different reticles (Circle Dot， Cross， 10 MOA and 3 MOA) for optimum versatility. - Head screw type windage and elevation click adjustments， with lock screw.- With integrated mount 20mm rail. - Suitable for rapid-firing or shooting of moving targets besides normal shooting.- Powered by 1 x lithium CR2032 battery (not included). Description:Objective Lens Dimension: 33 mm Product Color: Black Length: 8.5 cm Package weight: 0.242 kg Product size (L x W x H): 8.5 x 4 x 5.5 cm / 3.34 x 1.57 x 2.16 inches Package size (L x W x H): 11.8 x 9 x 6 cm / 4.64 x 3.54 x 2.36 inches Package Contents: 1 x Hunting Tactical Holographic Reflex Red Green Dot Sight Scope 20mm 1 x 22 x 332 x Lens Cap1 x Wrench1 x Cleaning Cloth1 x User Manual (English)