Function:Red dot sight

fit for: 20mm Picatinny Rail

Magnifier: 1x

Objective lens: 22 x 17mm

Material: aluminum

Division size: 4MOA

Dot Color: Red

Brightness level: Light control brightness

Zero value: 0.5 MOA

Field of view: 46' at 100 yards

Parallax: Parallax Free

Battery type: 1x Cr2032

Length: 45mm

Coating of the multi-layer lens.