D-Link's PowerLine HD Ethernet Adapter take advantage of your home's existing electrical wiring to create or extend a network2. Turn every power outlet into a possible network connection to connect computers, digital media players, and game consoles throughout your home.

The ZyXEL HomePlug AV PLA-401 is an extended access solution that allows your house to be completely networked using your existing electrical power lines. With no need for additional wiring, simply plug the ZyXEL HomePlug AV PLA-401 to an existing electrical outlet, and it will transform your electrical power lines into a house-wide network infrastructure. It's the easiest way to extend the network connection from your broadband router.

HP USB Network Print Adapter