Bought it from Man Shing. Got it for HK$3380 ~S$638. It does not come with a USB cable. It has a standard mini-USB port. I'm using it with 4x GP 2700mAh, OK for my current usage. Might look for an external battery pack if I shoot more often with it. Definitely muchX3 better than my FL-36. As my LightSphere does not fit, I begin to appreciate the built-in deflector card and diffuser. I have not use a FL-50 before (and will not), I think this Metz is a better deal as it has a secondary fill-flash. Especially so as I can't use my E-500 built-in flash with a external flash, whereas you can do that on a E-300. We do not have many choices for a good Four-Thirds Flash. Metz is my answer.