The Ares Green Dot Sight is an open reflex sight for rapid target acquisition of close range targets out to 100+ yards. Open reflex sights offer better peripheral vision and greater situational awareness than enclosed tube red dots. Comes with a parallax free circle cross reticle with a 2 MOA center dot. Electronically controlled illumination with multiple levels of intensity up to daylight bright. Manually turn on the green dot. Shake awake is active as long as the green dot is on. Automatically shuts off after 60 minutes of inactivity and re-activates instantly upon movement.