Features: brand new and high quality Complies with PClExpress system specification, which can expand your chassis into two USB3.1 Type-C ports at the same-time, support two devices to runs at the same-time, and the transmission speed can reach 10Gbps. SATA 15PIN power supply, sufficient and stable power supply to ensure stable operation of equipment. Backwards compatible with USB 2.0 and 1.1 devices; Supports simultaneous operation of multiple USB 3.0/2.0/1.1 devices. With quick and easy installation, this USB 3.1 PCI-express card offer simple solution for connecting to and using USB 3.1 devices on your standard desktop. Enjoy copying videos, music, photos, data files between USB devices and the computer at blazing fast speeds. Specifications: Material:Metal Operating System Compatibility: For Win7/8/10 32/64bit/Linux 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 Expansion Card