With quick and easy installation, the STW USB 3.0 PCIe card is designed to support simultaneous operation of multiple USB 3.0 devices on your standard desktop PC. USB 3.0 boasts high speed transfer rates of up to 5 Gbps, which means you can copy videos, music, photos, data files between USB devices and the computer at blazing fast speeds. It is the best choice for expanding and maximizing the USB 3.0 devices with the latest USB 3.0 data transfer technology! Specification: Model number: STW-3002 Material: Metal Color: Black Bus Mode: PCI-E * 1 Power Interface: Big 4Pin Transfer Rate: USB3.0 5Gb/s USB Interface: 2 External USB3.0 Port #43; 19Pin Header(2 Internal USB3.0 Port) Compatible slot: PCI-E 1X, PCI-E 4X, PCI-E 8X, PCIE 16X Operating system: for Windows 7 / 2000, for XISTA, for Windows XP Item weight: Approx. 59g / 2.08oz Package size: 15 * 9.5 * 2cm / 5.91 * 3.74 * 0.79in(L * W * H) Package weight: 84g / 3oz Package list: 1 * USB 3.0 2 Port PCI-E Card 1 * Screw 1 * Installation CD Note: The package list without user manual.