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.  

Features:  
Easily connect your MacBook Air computer to an Ethernet network with the Apple USB Ethernet Adapter. Small and light, it connects to the USB 2.0 port of your MacBook Air and provides an RJ-45 connector that supports 10/100base-T performance.  
 
Specifications:  
Device Type: Network adapter
Form Factor: External
Interface Type: Hi-Speed USB 2.0
Connectivity Technology: Wired
Cabling Type: Ethernet 10base-T, Ethernet 100base-TX
Data link Protocol: Ethernet, Fast Ethernet
Data Transfer Rate: 100 Mbps
Features: USB powered
Compliant Standards: USB 2.0
Expansion / Connectivity  
Interfaces: 1 x network - Ethernet 10base-T/100base-TX - RJ-45
Connections: 1 x Hi-Speed USB - 4 pin USB Type A
Cables Included: 1 x USB cable ( integrated ) - 15 cm
 
System Requirements:  
Mac OS X v10.4 and v10.5  
One available USB port

Windows 98/2000/XP/Vista (Need driver installation)  
 
Package Contents:  
Apple USB Ethernet Adapter x1
Driver CD(For Windows), manual