5mw Green Laser 532nm Tactical Sight Rifle Gun Scope w/ Rail & Barrel Mount Cap Pressure Switch Advanced laser optics give a superb laser sightEmits a highly visible intense green laser beam constantly Laser sight scope with 2 switches Metal Mount Hex-key for the mount pressure switch and 2 mounts tube diameter: 1'' Laser Wavelength: 532nmWeight:410g Output power: 5mW Package includeGreen Laser sight 1,Metal 22mm Picatinny Rail Mount & Rifle 1" Barrel Clamp Mount,Switch button Pressure Pad Switch and "8"type mount, Allen Wrench , 3V CR123A Lithium Battery