FOURSEVENS MMU-X3R-AF Maelstrom Regen Max output: 2000 lumens, 2.5 Hours Re-configurable: chose more modes for more versatility or fewer modes for easier access Rechargeable: includes one rechargeable lithium-ion battery and charging cable Body material: type-iii hard-anodized aircraft-grade aluminum Lens: optical-grade glass, with sapphire coating and antireflective coating