TRENDnet’s Powerline 1200 AV2 Adapter Kit with Built-in Outlet, model TPL-421E2K, comes with two Powerline adapters to create an extreme performance Powerline 1200 network using an existing electrical system. No CD installation required-encrypted TRENDnet adapters auto-connect out of the box. Plug in the first adapter and network it to your existing router. Plug in other adapters on the same electrical system and they auto-connect to the first adapter for immediate internet access. Never lose an electrical outlet with the built-in socket.