The new Digi-Slave Flex-Ring 6400 is a powerful, versatile LED ring light ideal for macro photography. Equipped with 64 oversized, super-bright white LEDs, 32 in the ring and two flexible arms with 16 each, the Digi-Slave 6400 features a variable power dial to quickly and easily optimize the light output. A larger inner diameter makes the Flex-Ring 6400 perfect no matter the lens size of your digital camera. It can be used as a continuous light source, and can also be triggered from a standard PC or hot-shoe sync. This compact, lightweight Digi-Slave Flex-Ring 6400 ring light is perfect for any kind of close-up photography and takes 4AA batteries or an optional power adapter. Contact SR Inc. at http://www.srelectronics.com for more information.