Such devices are similar to a small box, which simply using the cable connects to the TV. It is usually very small and is easy to place on a bedside table or table. Experts advise when choosing a place to try to put it on the windowsill. If it is possible to arrange this technique near the window, then concrete walls will not be an additional obstacle. Of course, they will not allow you to completely block the signal, but small deteriorations can be seen as a result of operation.
