20 pin USB 3.0 male header (this is a 20 pin header). - 9 pin USB 2.0 female header (this is a 9 pin header). USB 3.0 Header to USB 2.0 Header Adapter Cable. - For USB 2.0 motherboard header. The cable can let the USB 3.0 20 pin device connected to the USB 2.0 motherboard, such as CD-ROM, floppy drive panel.
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