Thanks so much for the information and your quick reply. That makes total sense. I already checked out the device and it is reasonably priced and it make sense to control ALL devices from a single remote. If I were to purchase another universal remote that already has RF then I would not need to purchase this additonal component.....correct? I guess to use the IR543 you need a direct line of site. It also seems that you are only able to control 8 devices (1-8 or 9-16) which is a bit of a limitation.