power I think, so it will NOT work with the chatpad driver until wireless support is added. Sorry.
I even bought a used Mac to try to learn from that driver and USB sniffing, but I don't think I ever really ended up using it. I am not positive, but I almost think someone tried wireless with it and it does not work with those drivers. Let me know though, I could be wrong. Or wireless might work but the chatpad does not, something like that.
Windows Vista/7 "business" or "pro", I think there is a workaround I can try to find you. Otherwise, the only workaround I know of is the Driver Signature Enforcement Overrider, but that's a third-party utility and I don't have the source code to it, so I can't vouch for it. I think some people use it with no problems, but use at your own risk, as with anything on the internets.