TP-Link TL-WPA4220KIT wireless powerline network adapter (WLAN Repeater, 500Mbit / s, 2-Port) set of 2, white (optional)
Both parts Plug & rewire, wait until the lights flash, ready. You can also configure the when you install software. Otherwise, the wireless SID accept as it is. Okay for me. One can the use as a repeater - if you have a WPA router. Or as an extender.