Amazon.com: TP-Link Powerline WiFi Extender - Add-on Single Adapter, Ethernet over Powerline, Plug & Play, Compatible with all TP-Link powerline adapters with different speed, AV600 with N300 WiFi(TL-WPA4220) : Everything Else
What is Powerline? | Powerline Adapter | TP-Link
How to build a roaming wireless network between your wireless router and TP-Link Wi-Fi Powerline Extender