Features: Brand new and high quality 8-port USB 3.0 expansion card. Two built-in 19Pin sockets, each socket can be converted into two USB 3.0 interfaces (i.e., four ports). Configure 40 USB 3.0 to be backward compatible with USB 2.0 and USB 1.1 to support hot-swapping of USB devices. With an advanced heat dissipation solution, the double-sided copper hole strip porous heat dissipation structure reduces high heat. Supports industrial cameras and cameras. Specifications: Number of Interfaces: USB 3.0x4 + 19 pinx2 Applicable Slots: PCI-E X4/X8/X16 Bus Bandwidth: approximately 12 Gb/s Product Size: approx. 16.5x12x6.7cm/6.50x4.72x2.64in Working Environment: 0 ℃-70 ℃ Applicable System: for Windows XP/Win7/Win8/Win8.1Win10, etc. Color: Black + Green Material: PCB + Metal Note: Please allow 0-1cm error due to manual measurement. Please make sure 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: 1PC x 8-Port USB Expansion Card