Yes, it’s how it’s capable of projecting our thoughts across the network with ease. It’s... fascinating, but something to be careful with. If I understand correctly, as long as you don’t try to remove it or tamper with the device, it won’t be an issue.

[Which was why he warned her, considering what she did to the sink...]

I can’t say for certain what happens to it when we’re sent home, I um... haven’t known anyone who went home and returned here, nor have I gotten to go home myself? I presume that it would have to be removed though? Especially where many of us are not from worlds where such technology exists.