D-Link DUB-1320 2-Port USB 3.0 Express Card: * Add 2 USB 3.0 ports to your laptop * Backward compatible to USB 2.0 and USB 1.1 * Transfer rates of up to 5Gbps * Up to 900mA of power per port with the included power adapter * Connect up to 127 USB devices by cascading multiple hubs * Easy Installation, hot-swap compliant