Foursevens Gen2 MM-X 2XCR123A With Burst Mode from 450 to 900 Lumen Maelstrom X7/MM-X Cool White LED Light, Black Finish Brightness Levels: Moonlight: 0.5 lumens, 25 days Low: 32 lumens, 21 hrs Medium: 250 lumens, 3.7 hrs High: Burst at 900 lumens, 1 minute then 450 lumens, 1.5 hrs Special Modes: Strobe: 10hz, 1 hr 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