They will have to run a cable or use your existing cable. What ever makes sense. It is not wireless for sure. Basically your 622 outputs both TV1 and TV2 on your coax to a specific channel. You then tune to that channel with your other TV.
You can also ouput TV2 via component, but I assume your 2nd TV is too far for that.
You can also ouput TV2 via component, but I assume your 2nd TV is too far for that.