Features: brand new and high quality The 8-port USB3.0 expansion card. Two built-in 19Pin sockets, each socket can be converted into two USB3.0 interfaces (i.e., four ports). Configure 40USB3.0 to be backward for USB2.0 and USB1.1 to support hot swap of USB devices. With advanced heat dissipation solution, double-sided copper hole strip porous heat dissipation structure reduces high heat. Supports industrial cameras and cameras. Specifications: Number of interfaces: USB3.0x4 + 19 pinx2 Applicable slots: PCI-E X4/X8/X16 Bus bandwidth: about 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 Package Includes: 1PC x 8-port USB expansion card note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!