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This Bluetooth dongle has a fake antenna(r/mildlyinteresting)
Ethernet of Power: www.amazon.com/TP-Link-Powerline-Adapter-Starter-T…
I got one of these set up for my house because the signal between floors was ridiculously poor and I running a line through the wall is a pretty decently sized job. Now I have a router on each floor, and they talk to eachother over the power lines.