Four large inductors, more stable power supply Supports hot plugging of external USB devices Support /Linux and other operating systems No external power supply Quick start, loading and file transfer. Low power consumption, quiet, reliable and . Chip: VIA805 Transmission speed: 5Gbps Slot: Compatible with PCIE 1X 4X 8X 16X slot Interface: 4 ports USB3.0 Model Number: PCI-E 1X 4-port USB3.0 expansion card Type: USB 3.0 PCI Express Card Type: adapter card Type: PCI Express Card Interface: 4 ports USB3.0 color:Black Material:PCB Package Contents: 2 x 4-Port Usb3.0 Expansion Card Only the above package content, other products are not included. Note: Light reflection 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.