Ving series camera flash (Vflash) is the world first rechargeable Lithium-ion powered hotshoe strobe. As a manual flash, V850 uses lithium-ion polymer battery instead of AA-sized batteries and external power pack. This brings three advantages: fast recycle time, more flash times, and convenience. It is an all manual flash to fit camera flash brands e.g. Canon, Nikon, Pentax, Olympus, etc.