Olight T25-G2 250 lumens, 2 x AADeveloped from previous 2009 versions, the T25 is sure to attract both existing users and new followers. The upgraded CREE R5 LED is the evidence of Olight"s strong commitment to always use the latest and newest technology, providing more brightness to serve their customers" needs.Olight T25-G2 250 lumens, 2 x AA Features: Utilizing the newest Cree XP-G2 R5 LED Structure improvement: to eliminate the loosen problem of inner compression ring Automatic memory function, remember last used setting & will come on at same level as when turn off Tough durable Type III Hard Anodizing Built to meet Mil-spec MIL-STD-810F Ultra Clear Glass lens, non scratch with Anti-Reflective Coating O-ring seals provide high water resistant and long service life Highest brightness is increased by 20% and longer thourowOlight T25-G2 250 lumens, 2 x AA Specifications: Powersource - 2 x AA batteries (0.8-4.2 V) **Can not support 2 similar sized li-ion batteries Bulb - Cree XP-G2 R5 Output - Hi: 250 lumens Lo: 15 lumens Run Time - Hi: 108 hours Lo: 50 minutes Submersible - 2 meters Water Resistant 1.5 m impact resistant