Are there "adapters" Ethernet-TP - Wi-Fi in nature?

Question

network hardware

It's such a thing that by the will of fate I have to travel to all sorts of different places and sow there reasonable and eternal. To do this, as a rule, you need to connect your laptop to a local network and sit, buried in the screen, for days on end. The problem is that the connection port is located in a noisy and cold server room, and at a height of three meters. And I would like to sit in a quiet conference room nearby and drink coffee. You can, of course, carry a hundred-meter patch cord with you, but this is also hard, and the question is what is better.
That's what I thought. And there must be adapters that plug into an RJ45 socket at one end, and Wi-Fi at the other end. And if this thing can work the shift even without power, then it’s generally fantastic.
What are the reviews? where to buy, how much..

Answer 1

www.tp-linkru.com/products/details/?model=TL-MR3020 - cheap and cheerful

Answer 2

can look away Powerline equipment