Four inductors, more stable supplySupports hot plugging of external USB devicesSupport Windows/Linux and other operating systemsNo external supplyQuick , loading and file transfer. Low consumption, quiet, reliable and durable.Chip: VIA805Transmission speed: 5GbpsSlot: with PCIE 1X 4X 8X 16X slotInterface: 4 ports USB3.0 Number: PCI-E 1X 4-port USB3.0 expansion cardType: USB 3.0 PCI CardType: adapter cardType: PCI CardInterface: 4 ports USB3.0color:BlackMaterial:PCBPackage Contents:1 x 4-Port Usb3.0 Expansion CardOnly the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.