Kanex USB 2.0 to 10/100 Fast Ethernet Adapter White (USBRJ45) Plug & Play Connects MacBook Air Or Other Devices To The Internet Usb Bus Powered Blazing Fast 100mbps Performance MacBook Air Compatible: Perfect for business or travel where Wi-Fi would be limited. Just plug the USB port into your MacBook Air and connect to a network instantly! Quick and Simple:Set-up is a breeze for those who have plugged a USB cable before. This adapter requires a one-time software installation, then plug and play. USB-Bus Powered:The Kanex USB Ethernet adapter is bus powered through USB therefore no external power required. Works with all PC's, Imac's, Macbook's and Microsoft Surface Pro models