TL-WPA4220 is an add-on unit and it must be deployed on the same circuit with other powerline adapters in a set of two or more Two Ethernet ports for
TP-Link Powerline WiFi Extender - Add-on Single Adapter, Ethernet over Powerline, Plug & Play, Compatible with all TP-Link powerline adapters with
TL-WPA4220, 300Mbps AV600 Wi-Fi Powerline Extender
TL-WPA4220, 300Mbps AV600 Wi-Fi Powerline Extender
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
TP-Link TL-WPA4220TKIT AV600 Powerline 300M Wi-Fi Extender with 2 LAN Ports X 3
TP LINK TL-WPA4220 KIT 300Mbps AV600 Wi-Fi Powerline Extender Starter Kit Wi-Fi Extend 300Mbps Wireless Connections 2 LAN Ports - AliExpress
TL-WPA4220, 300Mbps AV600 Wi-Fi Powerline Extender
TP LINK TL-WPA4220 KIT 300Mbps AV600 Wi-Fi Powerline Extender Starter Kit Wi-Fi Extend 300Mbps Wireless Connections 2 LAN Ports - AliExpress
TP-Link AV600 2-Port Powerline Gigabit Wi-Fi Adapter Kit, 2-Kit (TL-WPA4220 KIT) (Renewed) : Electronics
TP-Link TL-WPA4220TKIT AV600 Powerline 300M Wi-Fi Extender with 2 LAN Ports X 3