Finally, a macro LED ring light at a reasonable price that is also easy to use. The Ring 48 delivers 48 LED's that have a continuous run time of approxiamately 1-1/2 hours on just 2 "AA" NiMH batteries (not included) or 1-1/2 hours on alkaline batteries (not included). Also, it can be powered by an included AC adapter. This i a very easy light to use. Set the camera to automatic, turn on the Ring 48 and take pictures. That's all there is to it. This ring light can be switched from lighting just the left 24 LED's or the right 24 LED's or all 48 LED's at once. Unit comes conplete with lens mount adapters from 49mm to 67mm.