Feature:1. 2 USB 3.0 Ports: This PCIe to USB3.0 expansion card adds 2 external USB 3.0 ports on desktop computer for maximum 5Gbps data transmission.2. PCIe X1 Interface: This PCIe controller card adopts 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, for Vista, for 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 Laptop.4. Wide Application: This PCI Express to USB 3.0 card is ideal for USB 3.0 devices, including USB keyboard, USB mouse, USB speaker, USB KVM switchers, USB HUB, USB flash drives, printers, smartphones, tablets, and more USB A interface devices.5. Large 4Pin Power: This PCIe to USB 3.0 controller card adopts large 4Pin power interface, which needs to be connected to the power supply. Providing sufficient power for high speed transmission.Specification:Item Type: PCIe to USB 3.0 Expansion CardMaterial: Printed Circuit BoardPort Type: PCIe X1(X4, X8, And X16, Not Applicable For PCI Slots)Applicable Model: Regular Desktop Computer (Small Case Needs To Be Equipped With Small Bracket)Number Of Expansion Ports: 2 USB 3.0Transmission Rate: 2 x 5GbpsPower Supply: Large 4Pin Power Interface.Package List:1 xPCIe to USB 3.0 Expansion CardNote:1. Ensure that there is an empty PCIE X1 slot before. 2. The driver must be installed on for Win 7 (32/64bit) and previous systems. 3. Ultra thin PC users need to manually replace it with a thin bracket. 4. Use a USB 3.0 device to test the connection speed; otherwise, the peak speed cannot be obtained.