Apple USB Ethernet Adapter - Network adapter - Hi-Speed USB - Ethernet, Fast Ethernet - 10Base-T, 100Base-TX (MC704ZM/A)
The Apple USB Ethernet Adapter is a simple, one-piece external adapter that plugs into the USB 2.0 port of your MacBook Air to provide 10/100BASE-T performance. Simply plug your Ethernet cable into the RJ-45 connector - no external power is required. It''s small, light, easy to install, and even easier to use.