LED (Light Emitting Diode) 100% safe for the eyes. Unlimited Eye Relief for flexible mounting.Red and Green colored Four Reticle set: Dot, Star Burst, Cross, BullseyeMulti-position rheostat knob for five brightness settings for each Red & Green color reticle.Integrated Auto-Locking Quick Release Mount that will mount onto virtually any firearm with a Weaver, Picatinny, MIL-STD 1913 type rails.Black Anodized Aluminum Construction.International orders will not include batteries.