WANGPAI 4 Reticle Green Red Dot Sight HD101, Reflex Tactical Scope with Windage/Elevation Adjustment, 22mm Rail Mount(Free Warranty) This red dot sight comes with battery, hardware as well as lens protective cover. Light weight mount tools is solid and easy for use. Light weight red dot sight is multifunctional. 4 reticle patterns offer unlimited eye-relief and correct parallax, 5 level lights(both red and green) make the dot scope suitible many scene. Allen head screw type hardware is easy for windage and elevation adjustments, need to be used with locking screw(the small allen head screw) Small size and light weight scope is use-friendly for travel as well as outdoors, easy for installing in handgun, rifle and so on. This red dot sight is not only used for gun, rifle or AR15, but also the telescope, camera. Red dot scope can be connect with the camera mount or telescope mount. ASIN: B072MLZ2T7