The problem was simple: I needed an extension cord that the kids wouldn't pull out of the socket directly under their dining bench. I didn't even need the USB ports, but since the outlet serves the area around the dining table I figured they might be useful. While I haven't used the USB ports yet, the 110V outlets work great and have plenty of room for even large plugs. Wall mounting required surprisingly small screw heads, so be careful. In general, the design is very beautiful, I hope it will last a long time.
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