Sabrent USB 3.0 to 10/100/1000 Gigabit Ethernet LAN Network Adapter for Windows and MAC OS-X (NT-UG30) USB 3.0 male A to RJ45 female adapter supporting 10/100/1000 Ethernet. Supports backpressure routing and IEEE 802.3x flow control for full-duplex (FDX) and half-duplex (HDX) systems. Supports crossover detection and auto-correction and Wake-on-LAN (WOL). Powered via USB - no external power adapter needed, automatically saves power when Ethernet cable is unplugged. Not limited by USB 2.0 bandwidth. Practical speeds over 600 Mbps on USB 3.0 and Gigabit network