TP-LINK TL-WPA4220KIT

Quick overview from the supplier:

TP-Link Wireless Powerline Extender, TL-WPA4220KIT, 300Mbps // One Touch Super Range Extension - Wi-Fi Clone Button simplifies your Wi-Fi configuration and helps build a seamless unified home network HomePlug AV standard providing up to 600Mbps1 high speed data transmission over a home’s existing electrical wiring, ideal for lag-free HD or 3D video streaming and online gaming Extend 300Mbps wireless connections to previously hard-to-reach areas of your home and office