In our narrow 5-room old apartment we had no wifi reception in 2 rooms, as they were too far away from the Fritz box. Ordered So this extender kit and tried: Connecting was easy, both units each connected to a mains socket, transmitter via a LAN cable to the Fritz box, receiver device for configuration also via LAN cable, then switch to WiFi, and voila, we had reception and Internet in the two above mentioned rooms. Software from the CD installed on the laptop, from here everything can be configured to enter WPA key of the Fritz box, etc. manual and interface of the software only in English, but for me no problem. Ideally, one should each device on a main outlet on the wall plug (in the instructions), the sending device we have, however, plugged into a power strip, as there is no other way for us, and yet it all works. Is probably a matter of luck, sometimes it works and sometimes not. Because with us everything is working: 5 stars.