The Powerline AV 4-port Network Adapter lets you easily create a network using the existing electrical outlets in your home. Now you don't have to drill holes in walls and climb through the attic or cellar to install network cables -- just use the wires that already run through the building. The Powerline AV 4-port Network Adapter connects computers, or any other wired Ethernet device, using the HomePlug AV network standard. Adding devices to the network is as simple as plugging the Powerline AV 4-port Adapter into an electrical outlet, and connecting up to four Ethernet-equipped devices to the built-in Ethernet ports. Additional devices can be connected to the same network using additional Powerline AV Adapters plugged into an electrical outlet anywhere in the house.