This cable from Akiba-Accessories can let the USB 3.0 20 pin device connected to the USB 2.0 motherboard , such as cd-rom , floppy drive panel. It also support external USB 3.0 front panel connectors to USB 2.0 motherboard connectors. Allowing user to connect internal USB devices directly to the motherboard header connection. Features: Brand by Akiba-Accessories 19 pin USB 3.0 Female to 9 pin USB 2.0 male Support external USB 3.0 front panel connectors to USB 2.0 motherboard connectors Allowing you to connect internal USB devices directly to the motherboard header connection Connector A : 1 X 19 or 20 pin USB 3.0 Female Connector B : 1 X 9 pin USB 2.0 male Approx Length : 0.15cm Color : Black (Note : Photo attached is for reference only, it may be slightly varied in items of colour, shape from the actual item delivered from time to time)