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I used to have something like this (It used HomePlug 1.0), but every time I used the microwave oven, the network connection was lost. (The microwave was plugged into a socket on the reverse wall)
Beware of surge protectors and/or multi-plug adapter outlets . Only run one of these through a single outlet to single outlet. Also beware that appliance “noise” can effect this type of network. Other than that, they work great!