Foursevens Quark Click Qk2A-X Two output levels: max: 336 lumens, 0.8 Hours. Min: 3 lumens, 75 hours Uses two AA batteries (included) No hassle, simple interface, just click on and of or double-click to switch modes Body: type-iii hard-anodized aircraft-grade aluminum Lens: impact-resistant glass, sapphire coating, antireflective coating