Conforming pci express standard version 2.0;Meets meets the universal standard of the serial bus 3.0. Rate The transmission rate of the USB 3.0 interface could reach 5 gbps, downwards compatible with USB 2.0 / 1.1. 7a usb device to be connected simultaneously 7tlg;USB interface interface could provide 5v2a power supply to the external device. With two power modules, you don' need an extra power supply. Supports supports linux / windows xp / 7/8 / 8.1 / 10 and 32 bit or 64 bit whql certified driver About Description: This is a pci-express card 7 * high speed usb 3.0 interface expands when you need to use multiple external usb products at the same time, this express card will be the . colour: black Material: plastic Package Contents: 3 x 7 Port USB3.0 PCI Express Card Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.