Have been two sets of these outlets. The second set there were currently at Obi for 10 Euro. The remote control works through two concrete slabs. Sometimes it may be necessary even at close range, to press twice. I suspect that, depending on their own position is sometimes a bit in the way of shielding. Or any other device that uses radio waves, just bothers. The second click but it has always worked. The practical on / off light on the sockets is practical. The setting of the DIP switches is after a short training also catchy and the second set, I no longer needed the instructions. The one with the special batteries is a bit inconvenient, but here at Amazon available for just over a euro as Varta. I'm very satisfied and would buy it again at any time.