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 Speed: 5Gbps, 20Gbps Total Bandwidth Applicable System: Suitable for Win XP, for win7, 8, 8.1, 10, Etc Working Environment: 0℃ to 70℃ 1、4 Ports: The USB 3.0 expansion card will allow users to add 4 dedicated USB 3.0 channels (two front and two rear) on a desktop computer or server with a total bandwidth of 20Gbps (USB 3.0 4 ports). 2、Wide 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, live streaming devices, etc. 3、USB 3.0: This USB3.0 PCI Express expansion card provides 2 x external USB 3.0 type A interface and 2 x internal USB 3.0 type A interface, PCIE X4 design is suitable for PCI express X4, X8, X16 slot. Not for PCIE X1 slot, not for PCI slot 4、Self Power: This USB3.0 PCI Express expansion card adopts self power technology. Users do not need to plug in any additional power cords from the PC power supply and provide power for high power data devices with a maximum of 3A per channel for two ports (12A total). Inductor adopts 12mm*2mm enclosed super large power inductor 5、Widely Compatible: This USB 3.0 PCIe expansion card is suitable for Win XP, for Win 7, 8, 8.1, 10, etc. 1 x USB 3.0 PCIe Expansion Card 1 x Metal Plate 1 x Screw