Originally purchased two TPL422E units. Many hours later I was able to sync them NOT by following the instructions but by trial and error using the sync buttons. Bought a third 422E for another room; can't sync it with the other two. I called tech support: Despite her best efforts and mine, the woman was hard to understand. She showed me solutions that I could not implement. I remember reading that the SWITCH PANEL SIDE can affect its timing. I will not change the panel. I will return the third block, but I will say that a) these things are very difficult to handle and b) in technical support you need to speak at least a little English! NOT SATISFIED CUSTOMER.
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