AimShot HGPRO-C-G Circle Reflex Sight with Green Dot, Black Hg-pro-c-g Reflex sight, green illuminated circle with dot reticle 2000+ hours of battery life with a single included CR123A battery 9 step brightness adjustment with night vision mode Lens parallax-free 34mm coated Reflex lens Integrated adjustable quick Release for Picatinny rails