1、Stable Transmission: PCI E 4X extender extension card uses for ASMedia ASM3242 main control, stable transmission. 2、High Speed Rate: The highest speed of USB 2 expansion card can reach 20Gbps, the motherboard needs to support PC1 E04X, the hard drive case and TYPE C cable is also 20Gbps. 3、Broad Compatibility: PCI E to USB 2 expansion card is part of the USB2GEN2x2 standard and is backwards compatible with USB0 and USB0. 4、Plug and Play: USB 2 expansion card is a 4X interface that can be plugged into 4X8X16X slots, plug and play. 5、Support System: USB2 expansion card only supports for Windows 10, for Windows 11 and above, with the system comes with the driver, no need to install separately. 1 x PCI E to USB 3.2 Expansion Card1 x Short Stopper Item Type: PCI E to USB  3.2 Expansion CardMaterial: PCBMaster Control: for ASMedia ASM3242Maximum Transmission Speed: 20GbpsInterface: Single Port TYPE CSupport System: For Windows 10, for Windows 11 32 64BIT, for IOS, for Llinux