Quark Black AA&sup2; LED Flashlight - 177-Lumens - XP-G S2 Power: Two AA Batteries (0.9V~4.2V total) (included) Output: Maximum - 177 lumens; Moonlight - 0.6 lumens Maximum - 42 minutes; Moonlight - 1277 hours (53 days!) Modes: Strobe, S.O.S., and Beacon flash modes LED Emitter: Premium Cree XP-G S2