Foursevens Gen2 QT2L-X 2XCR123A With Burst Mode from 390-780 Lumen Quark Tactical X 123 Cool White LED Light, Black Finish LED: 2nd Generation Premium Cree XM-L Cool-white Max Output 780 OTF lumens. Output Modes: Moonlight: 0.5 lumens, 25 days Low: 5 lumens, 4 days Medium: 55 lumens, 14 hrs High: 300 lumens, 3.2 hrs Max:Burst at 780 lumens, 1 minute then 390 lumens, 1.9 hrs Strobe: 10 hz, 1 hrs SOS, 4 hours Beacon, 12 hrs Includes: Batteries, Lanyard, Split ring for keychain, Spare o-ring, Holster, Hand-grip Lens: Optical-grade glass lens with anti-reflective coating on both sides. T-6061 Aircraft-grade Aluminum Body. Battery: Two CR123A batteries (Included)