Offical Xbox 360 Wireless N Network Adaptor -

With increased speed, range and wireless security features, the Microsoft Xbox 360 wireless-N network adapter is the fastest and most convenient way to connect to Xbox Live. You can download or stream HD movies, popular TV series and games from the Xbox Live Marketplace with 1080p resolution and 5.1 surround sound from anywhere in your home. This network adapter by Microsoft is compatible with a/b/g/n networks and clips easily onto the back of your console, keeping clutter to an absolute mini This is an essential purchase if : 1) You want to play online via XBOX Live 2) You already have a wireless network 3) Your console is too far away from your router making it inconvenient / not possible to run an ethernet cable.