EZOWare USB 2.0 3-Port Hub + 10/100 Fast Ethernet Lan Network RJ45 Adapter for Ultrabooks, Netbook and more 2- in-1 combination of a 3-port USB 2.0 Hub and an Ethernet Adapter. Can work as a 4 Port HUB and a USB2.0 to Fast Ethernet Converter separately. Supports all USB devices; USB-Powered, no additional power adapters required. Compatible with thin laptops without RJ45 port such as MacBook Air, Ultrabooks, and Netbooks Compatibility supports Windows CE / 2000 / 2003 / XP / Vista /Win7, Linux 2.6.x, Android, Mac OS 10.x.