Features: Super Speed USB 3.0 supports transfer speeds up to 5 Gbps – actual transfer speed is limited by the connected device's settings. Supports 2 downstream ports for all speeds. Hot-swap, plug-and-play; Low power consumption. SATA 15PIN power supply provides sufficient and stable power to ensure stable equipment operation. USB 3.0 Expansion Card, backward compatible with USB 2.0 and USB 1.1 devices; Supports simultaneous operation of multiple USB 3.0/USB 2.0/USB 1.1 devices. With quick and easy installation, this USB 3.0 PCI-Express I/O card offers a simple solution for connecting and using USB 3.0 devices on your standard desktop computer. Specifications: Main Chip: uPD720201 Supported Interface: PCI-E 1X 4X 8X 16X Supported Systems: WinXP/Vista-/Win7/Win8 32bit/64bit MAC10.8 and above Compliant with PCI-Express 2.0 Compliant with USB 3.0 SuperSpeed Compliant with xHCI 1.0 Interface Type: NGFF- PCI-Express Maximum transfer speed up to 5 Gbps, which is 10 times faster than USB 2.0's 480 Mb/s. Backward compatible with USB 2.0, USB 1.1, USB 1.0. Transfer Speed: 5000/480/12/1.5Mbps USB Power Output: 5V 2A (Max) Note: Please allow 0-1 cm error due to manual measurement. Ensure you don't mind before bidding. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Includes: 1 x USB 3.0 Extension Card