Description: Bus-powered mode and no external power required for most of peripherals Power connector available for high current consumption peripherals 2 external 5Gbps Super Speed USB 3.0 Ports Fully compliant with Single-lane(x1) PCI Express 2.0 specification 4 pin connector supports extra power, no external power is needed Fully Plug & Play and Hot Swap Compatible connect System Requirement: PCI-E Slot (Not fit in a standard PCI slot, only PCIe) Specification: Port :2 external USB 3.0 port USB transfer data speed:5Gbps Power support:4 PIN connector Chipset: NEC UPD720202 Max. data transfer rate up to 5.0Gbps. Drive support Windows XP/Vista/Win 7 CE, FCC, RoHS and Microsoft certification Color:Black Dimension: approx. 120*67*1.5mm Package Includes: 1 x PCI-E to 2-Ports USB 3.0 Card 1 x CD