FourSevens QB2L-X 2XCR123A 540-Lumen Quark Turbo 123 X/QB2L-X Cool White Gen 2 LED Light, Black Finish Moonlight:0.4 lum, 20 days, 1ma/Low:9 lum, 2.6 days, 10ma/Med:86 lum, 13 hrs, 50ma/High:312 lum, 3 hrs, 250ma/Max:540 lum, 1.5 hrs, 990ma Special Modes: Strobe: 540 lumens, 3 hrs/SOS: 540 lumens, 6 hrs/Beacon: .4-540 lumens pulse, max 15 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