NcStar 1X30 Red Dot Sight / 3/8" Ring Dovetail / Pop Lens Cap (DP130/3) LED (Light Emitting diode) 100% safe for the eyes Rheostat knob-four different brightness levels Integrated ring mount(dovetail) Unlimited eye relief and field of view Made by NcStar Red Dot Sight Reflex Tactical Sight