This PCI-E to USB adapter board features 2 USB ports that allow you to connect with two devices at the same time The USB 3.0 extension card supports USB 3.0 whose speed can reach 5 Gpbs, so you can transfer data faster The PCI-E to USB hub features a simple and fast installation, connect and use, and is compatible with many kinds of computer OS The PCI-E to USB adapter card is compatible with PCI-E x1/x4/x8/x16 and the PCI-E interface can provide a stable power supply The PCI-E to USB can solve the problem of lacking USB ports and the board is compact Specifications: BUS interface: PCI-E x1 Compatible slots: PCI-E x1/x4/x8/x16 USB interface: 2x USB 3.0 Transmission rate: USB 3.0: 5Gb/s OS: Replacement for Windows XP 32/64/Win 7 32/64/Win 8/Win 8.1/Win 10 Note: Due to different computer resolutions, there may be some color distortion. Due to different manual measurement methods, there may be slight errors.