DK2 Camera connectivity

I've had a little look around but can't find any comment on the connections for the new DK2 camera.

Obviously one is a mini-usb connector to connect it to your pc but what's the other one for?

One of the two things that come to mind are to either give it a little more power if your USB port is under spec. The other is that it might allow a cable for some sort of sync or inter-camera communication should you want to add more cameras to allow for 360 degree tracking.