With the combo you can easily add 2xUSB3.0-Port Hub and 2xUSB2.0-Port Hub to your desktop・ from its USB3.0&2.0 connector. <br />3.5" Floppy Bay 2 USB3.0 and 2 USB2.0 4Ports Hub <br />USB3.0 20Pin connector for USB3.0 Hub <br />USB2.0 connector for USB2.0 Hub <br /> <br />Features:  <br />Come with 2 USB3.0 Hub and 2 USB2.0 Hub  <br />USB3.0 20Pin connector for USB3.0 Hub <br />USB2.0 connector for USB2.0 Hub <br />Material: industrial plastic anti-high-temperature and iron shell <br />2 USB3.0 ports & 2 USB2.0 ports-A female ports <br />Data transfer rate up to 5Gbps <br />Copper conductor for maximum conductivity and reliablity <br />High density double shielding for maximum rejection of EMI and RFI <br />Plug and play driver less installation <br />Backward compatible with USB 2.0 and 1.1 <br />Fits inside 3.5 inches open bay <br /><br />Support System: <br />Windows・ XP・ Vista・ Windows 7 8 32&64 Bit and Mac OS <br />Plug&Play・ no driver needed <br /> <br />Note: <br />the USB3.0 20Pin connector is actually 19pin・ as one pin of the connector is blocked up. <br />Specification: <br />USB Cable: 60-70cm <br /><br />User manual: <br />1. Turn off your PC; <br />2. Install the Hub to PC <br />3. Connect the USB3.0 20Pin connector to your motherboard <br />4 Connect the USB2.0 connector to your PC <br />5. Turn on your PC and you can enjoy great speed. <br /> <br />Package Includes:                 <br />1 x 3.5" USB Hub Floppy Bay Front Panel