Seeing the previous thread on wireless light switches reminded me of this link which might prove useful and save someone some money.
I had bought a three set of these and found you had to wander round the room to make them function, which rather defeated the whole idea. Having followed the suggested procedure, they now work brilliantly. Why theyr are sent out untuned I have no idea, bit obviously the QC stickers are meaningless.
Obviously take note of the dire warnings regarding electricity being DANGEROUS.
Andy C