The Double Clutch USB gives you the flexibility of shifting between beams and modes to fit your task, as well as choosing your battery source. It is also easy to use, even with gloves just a quick twist of the faceacp turns the light on and off, or changes the output from spot to flood. Features C4 LED with spot and flood beams both with high and low modes remembers the last mode used when you turn it back on Facecap twists for easy functionality, even with gloves Dual-fuel Powered by USB rechargeable lithium polymer battery also accepts 3 AAA alkaline or lithium batteries as back-up Lithium polymer battery features charge status indicator Low-profile construction with optimized center of gravity provides maximum comfort and stability during use 60 tilting head reduces neck fatigue Durable, impact-resistant polymer construction Locking mechanism on battery compartment opens easily to recharge or replace batteries, but keeps the body from popping open if dropped Streamlight Double Clutch USB Double Clutch USB Black