BEAMSHOT GB8300S Green Laser Sight True Daylight Laser with Quick Detach System carrying case and Battery are included) 532nm green laser beam at 500 yards nighttime range; 20 times brighter than red laser sights and visible in broad daylight Ambidextrous Momentary/Constant on/off toggle switch design Innovative quick attach/detach weapon rail mounting system for M1913/Picatinny rail; (patented) Powered by one CR123A battery that provides approximate 4 hours continuous laser use Built - in wrench for laser adjustment; Shock and water resistant; (Valued 40)