I dont know the answer to your specific question but the few digital boards i have seen/used were very clunky and notvery intuitive to use at all.
i see you can get the software needed from the whitebaord makers themselves.I've seen these in action before, not a white board but a 'smart board'. You can click on things by tapping the board. It's useful for presenting to a small audience, but other than that it's too cumbersome- I'd rather just project a laptop onto a regular white board.
What do you plan on using it for?