Dual Fuel Tactical, which means the Fury can be powered by either our micro USB rechargeable SF18650B battery or two 123A lithium batteries. The SF18650B turns the single-output Fury DFT into a pocket-sized spotlight that’s capable of projecting 1,500 lumens with a useful and far-reaching beam that’s also optimized for situational awareness. It’s built to withstand the harshest environments. Mil-Spec hard-anodized aluminum body, tempered window & O-ring seals make light rugged, and durable. Press tailcap slightly for momentary-on, or fully press and click for constant-on.