Foursevens QB2L-X 2XCR123A 435-Lumen With Burst Mode to 870 Lumens Quark Turbo Cool White Gen 2 LED Light, Black Finish Brightness Levels: Moonlight: 0.5 lumens, 25 days Low: 4 lumens, 5 days Medium: 65 lumens, 13 hrs High: 270 lumens, 3.5 hrs Max:Burst at 870 lumens, 1 minute then 435 lumens, 1.4 hrs Special Modes: Strobe: 10 hz, 1 hrs SOS: 4 hours Beacon: 12 hrs Included accessories: Batteries, lanyard, split ring for keychain attachment, spare o-ring, holster, hand-grip Lens Material: Impact-resistant glass, sapphire coating, antireflective coating Body Material: Type-III hard-anodized aircraft-grade aluminum