My girlfriend just got a new ebook reader — a jetbook — that came with an unusual USB cable. One end is a regular USB mini B head, but the other end has two plugs. Both are USB non-mini A size, but one is red. The manual gives no indication about what the red head does; is it a standard cable type? What is it for? It looks like this:
EDIT: @Chris, Thanks for the answer. It brings up a follow-up question, though: can/should both heads be plugged in at the same time? Or would that confuse or damage the device?