Welcome to the store! 1. 2 USB 3.0 Ports: This PCIe to USB 3.0 expansion card adds 2 external USB 3.0 ports to desktop computers for a maximum data transfer rate of 5 Gbps. 2. PCIe X1 Interface: This PCIe controller card uses a PCIE X1 interface design, suitable for PCIE X1, X2, X4, X8, and X16 slots. 3. Widely Compatible: This PCIe USB 3.0 expansion card is suitable for Win 11, 10, 8.x (32/64bit), and for Win Server 2012, 2012R2, 2016, 2019, 2022 (above systems are plug and play). Suitable for Win XP, Vista, Win 7 (32/64bit), and for Win Server 2003, 2003R2, 2008, 2008R2 (32/64bit) (above systems require drivers). Suitable for Linux, not for OS X Laptops. 4. Wide Range of Applications: This PCI Express to USB 3.0 card is ideal for USB 3.0 devices, including USB keyboards, USB mice, USB speakers, USB KVM switches, USB hubs, USB flash drives, printers, smartphones, tablets, and more USB A interface devices. 5. Large 4-Pin Power Supply: This PCIe to USB 3.0 controller card uses a large 4-pin power interface, which must be connected to the power supply. It provides sufficient power for high-speed transmission. Item Type: PCIe to USB 3.0 Expansion Card Material: Circuit Board Port Type: PCIe X1 (X4, X8, and X16, not applicable to PCI slots) Applicable Model: Regular desktop computer (small chassis requires a small bracket) Number of Expansion Ports: 2 USB 3.0 Transfer Rate: 2 x 5 Gbps Power Supply: Large 4-pin power interface 1 x PCIe to USB 3.0 Expansion Card Your satisfaction is our top priority. We will provide you with the best service. If you encounter any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately and we will provide you with the best solution!