Product size: about 120 x 90 x 19 mm Interface: 4 USB3.0 output port ( compatible with USB 2.0， USB 1.1.) Support System : Windows2000/XP/Vista/7 Product Model : NECXG PC-4p Extended Interface : USB3.0 x 4 Comply with PCI-Express Specification Version 2.0 Master IC: NEC720201 4 -port USB3.0 interface can connect four USB devices at the same time USB3.0 interface transfer rate up to 5Gbps， also compatible with USB2.0 and USB 1.1 USB3.0 interface with the senior pin interface Support USB hot-swappable ， p lug and play With 4 PIN ports， need to connect the power supply when working 1 x PCI card1 x DiscIn original package