Question about Devolo dLAN pro 1200+ WiFi

The unit is always used in a pair. This is a single adapter and is intended for expansion. Unfortunately, I don't know exactly what you want to know or what your installation should look like, but I can tell you the following. To set up a powerline connection, you need a router, an Ethernet cable and at least two powerline adapters: one for the router and one for each device you want to connect to. The first adapter must be plugged into the wall socket and connected to the router by cable. The second adapter can be plugged into any room (it must be the same circuit) and from there connected to an end device by cable. Once the second adapter is connected to a power outlet, the two adapters use the power lines between the rooms to send network signals to each other. In this way, an Internet connection is established outside the normal range of the router.