Features: Add four USB 3.0 Port to your to your PCIe-enabled desktop easily with PCI for Express to USB3.0 Controller Adapter. 4 interfaces work independently of each other. No additional power cord is required. Adopt VL805 Main control chip, to reach USB 3.0 Max 5Gbps transmission speed, 4 USB 3.0 port can work at the same for time. Each interface has separated insurance, with over current & short circuit for protection. Protect your devices and computer. Metal material to ensure a more stable power supply of each interface. Enjoy copying movies, data files, music, photos between USB devices and the computer at a faster speed. Support PCIE X1 / X4 / X8 / X16 slot. For WIN8/10 system is plug-and-play, no driver installation is required. For Win 7/XP/Vista Need to insatall drive. Specifications: Material: Metal Input Interface: PCI-E X1 for X4/X8/X16 Compatible: USB1.1, USB 2.0, USB 3.0, USB 3.1, USB 3.2 5G Speed: 5Gbps Number of Interfaces: USB 3.0x4 Weight: 79.4g Size: Approx. 6.5x6.5x12 for cm/ 2.56x2.56x4.72 inches Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x 4 Port USB 3.0 Card