It is a wall-piercing, but watch your other remotes.

Marmitek Powermid XL
This is a good device if used alone.
The receiver (the one at the other end of the chain) works and obeys the remote Canal + Le Cube.
The remote control from one to the other is impressive, over 12 meters through 3 walls, 2 carriers (in 6 storey building) and it works EXCEPT that ...

When I connect the XL Powermid sector, all other infrared remote controls the room from which I send my signal are neutralized, including MARMITEK X10 modules.
The IR and RF commands of other devices have no effect, the 'good-blocks taken market' and LINAK remote control electrical box springs.
As soon as I unplug the Powermid XL, everything is in order.
Better yet, when I disconnect the transmitter IR diode output s "light only.

The technical service Marmitek said changing the transmitter site ....
Chance, my TV SONY KDL 46Z4500 is probably emit radiation, but in my room of 4.5 meters of 4, I have no place to put this transmitter so that it does not suffer any influence.
It is hopeless ..