We have cable tv at home, two tv's, one in the den and one in the bedroom. Only the den has a cable box. We want to be able to watch cable in the bedroom as well. Is there a way to do this without having to rent another box from the cable company? It will be an either or type of usage, meaning we don't need to be able to watch separate shows on each tv. So whatever is on in the bedroom will be on in the den as well, that's fine.