FOURSEVENS Quark Click QK2L-X Flashlights Two output levels: max: 780 lumens, 1.9 hours, min: 55 lumens, 14 hours Uses two CR123A batteries (included) Simple interface, just click on and off or double-click to switch modes Body: type-III hard-anodized aircraft-grade aluminum Lens: impact-resistant glass, sapphire coating, antireflective coating