The USB 3.1 port interface is using the USB 3.0 pin set and more. It is design to be backwards compatible .There are no official release of the specs for the USB 3.1 header yet (as of this writing), But first motherboard with this is the ROG MAXIMUS IX FORMULA,STRIX Z270I/Z270G etc.The cable only support usb3.1/usb3.0 device, it can't work at USB2.0(480Mbps)USB 3.1 require a different front panel header than USB 3.0.Length: 20cmMaterial: plasticColor: black