Estone New Floppy Bay 20 Pin 2 Ports USB 3.0 Front Panel Bracket Header Cable It extends the USB 3.0 from mainboard to a idle flopppy drive space,plug and play Maximum speed:4.8Gbps (Superspeed) which is 10 times faster than USB 2.0 (480Mbit/s) Backwards-compatible with USB 1.1 and USB2.0 Compatible with Windows 7/Vista/XP/Mac The cable length is about 60cm.