3.5 inch Front Panel USB Hub with 2 USB 3.0 Ports Offers two external USB 3.0 super speed ports. Super-Speed USB 3.0 supports data transfer speeds up to 5 Gb/s (maximum). Backward compatible with USB 2.0 / 1.1. Cable length: 50cm - connects to motherboard USB 3.0 header Hot-swapping. Plug and play. Easy to install, no external power needed.