True Green 532nm laser beam for the brightest green laser possible. 50-100 times brighter than traditional red laser sights. Visible range of 400 yards in broad daylight and 4 miles at night with the naked eye. Multi-coated optical glass lenses for a noticeably sharper dot at farther distances. Four point alignment system for the most accurate and true holding zero over any other unit on the market! Extremely durable lightweight T6061 Aircraft Aluminum construction and waterproof to 30 meters. Wavelength: 532nm (green). Output: 5 mW. Requires a standard CR 123a battery. Battery Life(Continuous): 5 hours. Dot Size: 0.5" @ 100yds. Size (laser only): .81"W x 4.9"L. Weight with Battery: 3.75 oz. Finish: Matte Black. Operation: Removable Pressure Switch. Includes: MT61167 (mount).