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 ASUS 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.<br><br>Length: 20cm Connector 1: USB 3.0 Front Panel Header Connector 2: USB 3.1 Front Panel Header Material: plastic Color: black<br><br>Package Contents: 1 * USB Extension Cable<br><br>Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.