Green Blob Outdoors Holographic 4 Reticle Red/Green Dot Tactical Reflex Sight Scope with Mount 33mm Battery and Instructions Included. 4 reticle patterns offer unlimited eye-relief and corrected parallax Light weight water-resistant and shockproof features enhance your performance in all climate conditions Allen head screw type windage and elevation click adjustments with locking screw Built-in picatinny mount base for easy sight remounting. By adjusting distances and focus as well as the brightness of lights we can get clear reticle. sight includes 4 sighting dot patterns to assist aiming at a target 50 to 100 yards away.