It extends the USB 3.0 from mainboard to a idle floppy drive space, plug and play Backwards-compatible with USB 1.1 and USB 2.0
Transfer rate: 5GPps above Backward compatible with USB 2.0, 1.1 version This bay allows you to convert an unused 5.25" floppy drive space into 2 USB 3.0 Port& 2 USB 3.0 Port and 1 HD Audio Port/1 Microphone Port Type-c support SATA Hard disk chassis DIY Support WINDOWS2003 / 2007 / XP / Vista / WIN7 / WIN8, support plug and play
Quality Control: pin plate gold 15u", 5000times plugging test