USB 3.0 20 Pin 2 Ports Front Panel Floppy Disk Bay Hub Bracket Adapter Cable #2 Plug in USB 3.0 connector on PC motherboard Backwards-compatible with USB 1.1 and USB 2.0 Maximum Speed: 4.8Gbps(SuperSpeed) which is 10 times faster than USB 2.0(480Mbit/s) Easy solution for extending two USB ports on Front of computer Cable Length:53cm.