This USB 3.0 expansion card allows users to add 4 dedicated USB 3.0 channels (two front and two rear) to a desktop computer or server with a total bandwidth of 20 Gbps. Broad Application: This PCI Express USB3.0 card is suitable for all USB interface devices, including SSD/HDD enclosures, flash drives, industrial cameras, VR playback boxes, livestreaming devices, etc. USB 3.0: This USB3.0 PCI Express expansion card provides 2 x external USB 3.0 Type-A interfaces and 2 x internal USB 3.0 Type-A interfaces. The PCIE X4 design is suitable for PCI express X4, X8, X16 slots. Not for PCIE X1 or PCI slots. Self-Powered: This USB3.0 PCI Express expansion card utilizes self-power technology. Users do not need to connect any extra power cables from the computer's power supply, providing power to high-power data devices with a maximum of 3A per channel for two ports (12A total). The inductor uses a 12mm*2mm enclosed super large power inductor. Widely Compatible: This USB 3.0 PCIe expansion card is suitable for Win XP, Win 7, 8, 8.1, 10, etc. Item Type: USB 3.0 PCIe Expansion Card Material: Printed Circuit Board Bus Interface: PCIe X4 (Compatible with PCI E X4 X8 X16) Expansion Ports: External USB3.0 x 2 + Internal USB3.0 x 2 Transmission Rate: 5 Gbps, 20 Gbps total bandwidth Applicable System: Suitable for Win XP, Win 7, 8, 8.1, 10, etc. Working Environment: 0℃ to 70℃ 1 x USB 3.0 PCIe Expansion Card 1 x Metal Plate 1 x Screw