But isn't that sort of like saying "the only thing missing from packet the car dealer gave me when I purchased the car is the key to turn the car on" :-). Seriously, this question comes up again and again and again and it's absurd that Sharp does not address this in their manual. I wonder how many hours have been wasted on the part of dealers and Sharp representatives every time a dealer installs one of these with a control system for the first time.