Netgear XE102 Powerline WALL-PLUGGED Ethernet Bridge.  Buy 1 if you already have a pair and are adding another receiver. 

 NOTE: NETGEAR XE 102 IS REFURBISHED

Set up a home computer network by linking your Ethernet-equipped computers and devices over existing, standard 110-volt electrical wiring with the Powerline Wall-Plugged Ethernet Bridge from Netgear. This unit plugs into an electrical outlet and uses your existing electrical wiring to give your entire household access to your Cable/DSL connection. With no new wiring or cabling to install, you can now surf the Web, participate in online gaming, send and receive email, and also share files and printers, all from different rooms at the same time. Uncomplicated and quick to install, it plugs right into a wall outlet, reducing clutter and saving desk space. Designed for ease of use, the Powerline Wall-Plugged Ethernet Bridge features easy-to-read icon LEDs and protects your network communications from eavesdroppers and hackers with 56-bit Data Encryption Standard (DES).