These heads-up window style Red Dot Sights from BSA offer fast target acquisition with a sight line that allows both eyes to remain open. The window design is not restrictive, offering a truly panoramic field of view. One CR20323 volt lithium battery and rubber lens cover are included. 1 year limited warranty.
Objective Lens Diameter:34mmx24mm
Parallax Setting: 50 Yds
Click Adjustment Value: 1/2"@100Yds
Battery: CR2032 (Included)