Features: Brand new and high quality Advanced USB 3.1 Technology: SuperSpeed USB 3.1 supports data transfer rates up to 10 Gbps, twice as fast as USB 3.0, 20 times faster than USB 2.0. Two Reversible Type-A Ports: Add two USB 3.1 Type-A (USB-A) downstream connectors for standard desktop computers. 2 reversible Type-A ports easily connect to 2 Type-A enabled devices simultaneously, no matter which side you connect to. Excellent Performance: SATA 15-pin power provides power to USB-A enabled devices and supports up to 5V output on each USB 3.1 port. Easy to Use: The built-in hot-swap function allows you to change computer system components without shutting down the system. Wide Compatibility: Works with all PCIe x4, PCIe x8, and PCIe x16 slots. For USB 3.0, USB 2.0, and USB 1.1 devices. For Windows 10 / 8.1 / 8 / 7 / XP / Vista operating systems. Specifications: Product Name: PCI-Express 3.0 to Dual USB3.1 Expansion Card Bus Type: PCI-E X4 (for PCI-E X4 / X8 / X16) Main Chip: For ASMedia ASM3142 Interface: 2 USB3.1 Ports (maximum power 5V / of each USB3.1 2A). Speed: 10Gbps Working Environment: 0-70 degrees Product Weight: 85g Features: Expand the USB 3.1 interface, connect USB peripherals quickly! Supported Systems: For Windows XP / WIN7 / WIN8 / WIN8.1 / WIN10 ect. Note: Due to different monitor and lighting effects, the actual color of the item may differ slightly from the color shown in the pictures. Thank you! Please allow 1-2cm measurement deviation due to manual measurement. Package includes: 1 x 2-Port USB 3.1 PCI for Express Card