HandAcc Aluminum 3 Port USB 3.0 Hub with RJ45 10/100/1000 Gigabit Ethernet Converter - Expands your PC with three USB3.0 ports and one RJ45 Gigabit Ethernet port. USB 3.0 male A to RJ45 female adapter supporting 10/100/1000Mbps Ethernet. - IEEE 802.3, 802.3u, and 802.3ab compatible. Supports full duplex operation with IEEE 802.3x flow control. - Premium aluminum finish matches the look and feel of your MacBook. No external power required, built-in surge protection keep your devices and data safe. - After initial driver installation (CD included), allows for plug and play ability. On Windows, a driver needs to be manually installed to enable Ethernet connection. Latest Driver Download: Please go to the official download page of Realtek search for "RTL8153", or Contact us. No drivers required for Data ports on all compatible systems. - System Requirements: Windows (32/64 bit) 8.1 / 8 / 7 / Vista / XP, Mac OS X 10.6 to 10.9, Linux 2.6.14 or above.