I recently moved into an apartment and it uses an Ethernet cable to connect to the the TV to the wall via an RG6 male to RJ45 female adapter. It's the first time I'm seeing this type of connection.

That includes situations such as hotels where there is bad WiFi but an RJ45 wall connector. On the other hand, the media bridge mode can turn a non-WiFi device into one with WiFi.

Basically, you just cut off an RJ-45 cable and attach it to your key ring, then mount a few ports to your wall. Plug the severed cable into the port and your keys will hang from it securely.