Features: brand new and high quality Equipped with 6 USB3.0 ports, backward for USB2.0 and USB1.1, and supports USB device hot plug function. PCI-E X4 interface, you only need the motherboard to have a PCI for Express X4 / X8 / X16 slot, you can easily expand, plug and for play, convenient and fast. High-performance independent chip, each channel is equipped with a chip, each channel has exclusive broadband to increase the transmission speed. 19-pin expansion, 3 built-in 19-pin plugs, each plug can be transferred to two USB3.0 ports 5. Efficient heat dissipation function, using high thermal conductivity alloy material heat sink and fan, can dissipate effectively heat generated by the expansion card, so that the expansion card works more stably. Applicable system, for Windows xp / Win7 / win8 / Win8.1Win10, etc. Specifications: Product Name: PCIE to USB 12 Port Expansion Card Number of interfaces: USB3.0 x 6 + 19pin x 3 Applicable slots: PCI-EX4 / X8 / X16 Bus bandwidth: about 20 Gb / s Color :Green Material: PCB + metal material Size: approx.120x156x98mm/4.72x6.14x3.86in Working Environment: 0 Celsius-70 Celsius Applicable system: for Windows xp / Win7 / win8 / Win8.1Win10, etc. 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! Package includes: 1PC x 12-port USB expansion card