How to add another powerline adapter to the existing powerline network with pair button | TP-Link
TP-Link AV1000 Powerline Ethernet Adapter Add-On Unit TL-PA7017
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
NETGEAR Powerline 1000 Network Adapter - Micro Center