NcStar Red and Green Dot Reflex Sight/4 Different Reticles/Weaver Base (D4RGB), Black LED (light emitting Diode) 100% safe for the eyes Unlimited Eye relief and field of view Multi position rheostat knob for Red or green Illumination Made by NcStar Features a 100 percent safe, battery-powered red LED light to point wherever you're aiming Comes with an integrated weaver-style mount and tool for easy attachment