TP-LinkAV1200 gigabit powerline adapter. This can be used to extend your WiFi network coverage by sending the signal through your power cabling in your house. But you do need (at least) two of them, so this is only of use to someone who has the corresponding adapters.
This is the TL-PA8030P model.
Home network "Powerline" extender (Chesham HP5)
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