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Brightness Levels: Moonlight: 0.3 lumens, 6 days/Low: 30 lumens, 21 hrs/Medium: 270 lumens, 2.8 hrs/High: 480 lumens, 1.3 hrs Special Modes: Strobe: 10hz, 480 lumens, 2.5 hrs/SOS: 4.5 hrs/Beacon: 12 hrs Included accessories: Batteries, lanyard, spare o-ring, holster, non-crenated spare bezel, flat grip-ring spacer Lens Material: Optical-grade glass lens, sapphire coating, antireflective coating Body Material: Type-III hard-anodized aircraft-grade aluminum