PCI-E to 4-port USB3.0 expansion card Expand 4 USB3.0 interfaces on a PC with a PCI-Express slot Compliant with PCI-Express specification version 2.0 Compliant with USB3.0 SuperSpeed specification version 1.0 The maximum transfer rate is up to 5Gbps, much higher than 480Mb/s of USB2.0, up to 10 times (theoretical value) Backward compatible with USB2.0, USB1.1, USB1.0 Transfer rate: 5000/480/12/1.5Mbps USB power output: up to 5V 900mA Support USB hot plug function Support for 2000/XP/2003/Vista and 64-bit XP/2003/7, etc Specifications: power port Color: Black Material: PCB Package Contents: 1 x PCIE Expansion Card Only above package content, other products are not included. Note: Light reflection and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.