Ideal for Ultrabooks Designed to give Fast Ethernet connectivity to your Ultrabook, Macbook Air or any computer without an Ethernet port. Simply plug the adapter into a USB 2.0 port and instantly utilize a stable 10/100Mbps Ethernet connection. The EU-4208 is also a quick and convenient way to add Ethernet connectivity to a desktop computer without the hassle of internal installation. Its backward compatible with USB 1.1 and works with Microsoft Windows 2000/XP/Vista/7/8/8.1, Linux and Mac OS X 10.x. USB 2.0 for Full 10/100Mbps Ethernet Performance Compared to USB 1.1 adapters which only offer 12Mbps transmission speeds, the EU-4208 is designed with the USB 2.0 standard which supports data transfer speeds up to 480Mbps, ensuring full 10/100Mbps Ethernet performance without any compromise. Compact Design Power over USBT The Edimax EU-4208 features a compact design, making it easy to use in a crowded workspace. And with power over USB support, the EU-4208 works without the need for an additional power adapter. Low Power Consumption The Edimax EU-4208 is designed to use power efficiently and prevent unnecessary waste of power. It can dynamically adjust its power supply for reduced power usage in idle mode and low traffic conditions.