SnG Tactical Products Green Tactical Laser Aluminum Body For Durability Covered Windage and Elevation Adjustments Push Button and Pressure Switch Controls Included Weaver/Picatinny Rail Mounting Bracket 532nM Wave Length 5mW Output 3v DC Voltage CR 1/2 AA Lithium Battery Source 0.1nm Beam Width 1mm Beam Diameter Compare to Units Costing Hundreds More!