dodocool 3-Port USB 3.0 Hub with 1 RJ45 Gigabit Ethernet Lan Wired Network Adapter Adopts high-strength ABS plastic with fine workmanship, compact and delicate. Adds 3 superspeed USB3.0 ports. 5Gbps theoretical transmission speed. Downwards compatible with USB2.0/USB1.1.Integrated USB3.0 PHY controller, in line with USB3.0 transmission specifications. Supports IPv4 and IPv6 packets checksum offload engine(COE) to reduce CPU load. Supports Windows XP and above, and MAC OS X V10.6 and 10.8, hot swappable.