This pocket-sized tactical flashlight is able to output a powerful 1000 Lumen beam that can throw over 800 feet. Powered by a 18650 (included) or a pair of CR123As, this efficient light can run on its max output for over two hours and has a potential 800 hours of runtime! The flashlight's dual switch interface allows for momentary activation and instant access to Strobe. The UC35 V2.0 is internally rechargeable thanks to its handy micro-USB charging port.