With two power module, not need extra power supply. Supports Linux / XP / 7/8 / 8.1 / 10 and 32 bit or 64 bit WHQL certified driver Size: 7 USB3.0 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: PCB+metal Size: 120 x 74 x 18mm Package Contents: 1 x 7 Port USB3.0 PCI Express Card 1 x Driver CD 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. Conforms To PCI Express standard version 2.0. Meets Universal Serial Bus 3.0 standard. USB 3.0 interface Transmission rate could reach 5Gbps, downward compatible with USB 2.0 / 1.1. A USB device to be connected simultaneously 7tlg. USB interface could provide 5V2A power supply to the external device.