DEGOL PCI-E Express Card USB 3.0 4 Ports and 5V 4-Pin Power Connector for Desktops Plug & play super fast and high-capacity data transfer solution, 4 USB 3.0 supports transfer speed of up to 5Gbps Backwards compatible with USB 2.0 and 1.1 devices. Compliant with Single-Lane PCI-Express throughput up to 5Gbps, supports 2.5Gbps PCI-E bus with full duplex channel. Support Windows XP/Vista/Win/Win8/10 4-pin power connector available for some high current consumption peripherals, like HDD. Bus-powered mode and no external power required for most of peripherals.