Yes, it is USB power only. On second thought I could have provided the power option and a jumper to select. Certainly a lot of empty real estate.
I have a couple of lenses for my SLR that have way less distortion. But it is much harder to get close with proper lighting. Using a flash makes some pretty nasty reflections or shadows, even with diffusion. Am not setup for indoor closeups, love nature, landscapes and people photography. I used to have a scanner, it worked great for boards.