RJ45 female to USB 2.0 male. 3 ports USB 2.0 hub. Support Windows 98SE, 2000, ME, XP, 7, VISTA, Linux, MAC OS X. Powered by USB port, no external power adapter required. Compatible with USB 2.0 and USB 3.0, and the transmission rate is 480 Mbps. Ethernet support 10/100 Mbps high speed transmission. It is easy to connect your computer to an Ethernet network with the adapter. It connects the USB 2.0 port of your computer and provides an RJ45 connector. No Need Driver in MAC OS. Support suspend/resume detection ogic. Support both full-duplex and half-duplex operations.