As per pci express version 2.0 standard. Meets meets the universal serial bus 3.0 standard. Rate the transmission rate of USB 3.0 interface could reach 5gbps, down compatible with USB 2.0 / 1.1. 7a usb device to be connected simultaneously 7tlg. USB interface interface could provide 5v2a power supply for external device. 15-pin interface interface for optional power supply. Supports supports windows xp/7/8/8.1/10 and 32 bit or 64 bit whql certified driver.Package Includes:1PC x PCI-E Expansion CardSpecifications:Material: metalColour: blackProduct name: PCI-E to 7-port USB expansion cardNumber of interfaces: 7-port USB3.0 interfaceSlot used: PCI-E X1 X4 X8 X16Bus bandwidth: 12Gb/sSize: approx. 12x7.1cm/4.72x2.80in