Features: brand new and high quality Super Speed USB 3.0 supports transfer rates of up to 5Gbps - The actual transmission speed is limited by the setting of the device connected. Supports 2 downstream ports for all speeds.Low Energy Consumption. SATA 15PIN power supply, sufficient and stable power supply to ensure stable operation of equipment. Backwards for USB 2.0 and 1.1 devices; Supports simultaneous operation of multiple USB 3.0/2.0/1.1 devicesOperating System Compatibility: for Windows 10/8/8.1/7/Vista/XP 32/64-bit, Server 2003-2008 32/64-bit, Linux. Hot-swappable, plug and for play; Enjoy copying videos, music, photos, data files between USB devices and the computer at blazing fast speeds. Firmware can be not only updated at any for time, but upgraded directly online. Specifications: Main Chip: D720202 Support interface: PCI-E 1X 4X 8X 16X Support systerm: WinXP/Vista/Win7/Win8 32bit/64bit MAC10.8 and more Conformance to PCI-Express 2.0 Conformance to USB 3.0 Super Speed Conformance to xHCI 1.0 Maximum transmission rate up to 5Gbps, it is higher 10 times than 480Mb/s of USB2.0 Compatible below with USB2.0, USB1.1, USB1.0 Transmission rate: 5000/480/12/1.5Mbps USB Power Output: 5V 2A(Max) Size : approx 12x8cm/4.72x3.15in Package Includes: 1 x USB 3.0 Extension Card note: Please allow 1-3mm error due to manual measurement and there will be different color as different display, please understand. Thanks.