Description: Dual USB 3.0 B Type Male to 20Pin Header Slot Adapter for Motherboard - External to Internal Allows for easy USB 3.0 port expansion Supports USB 3.0 data transfer rates up to 5Gbps Backwards Compatible With computer USB 2.0 and USB 1.1 ports Perfect for connecting USB 3.0 optical drives, card readers, USB expansion ports and more Specification: Material:PVC Color:Black Cable length:0.7m/2ft Cable:24+28 AWG OD5.5MM Package Includes: 1xUSB 3.0 20pin to Type B Male Adapter