4 Ports PCI-E to USB 3.0 HUB PCI Express Expansion Card Adapter 5Gbps for Motherboard With 9.5mm Length low profile bracket and standard bracket. You need to install the USB3.0 driver for your computer first. Interface: Interface: Single- (x1) PCI Express Gen2 Mode Port: 4 external USB3.0 ports Speed: Data Transfer rate of 1.5/12/480/5000 Mbps. Low Speed (1.5Mbps), Full Speed (12Mbps), High Speed (480Mbps), Super Speed (5Gpbs) Power Input: SATA or IDE Power Connector Power output: +/-5V / 900mA (each port) Compatible: USB1.1/2.0/3.0 Operating Systems: Windows7/8/10(32/64bit) Color: as shown Material: ABS Package Contents: 2 x PCI Express 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.