Anker Uspeed USB 3.0 PCI-E Express Card with 4 USB 3.0 Ports and 5V 4-Pin Power Connector for Desktops [VL805 Chipset] SuperSpeed USB 3.0 supports transfer rates of up to 5Gbps - The actual transmission speed is limited by the setting of the device connected. 4 USB 3.0 downstream ports for standard desktop PCs. Backwards compatible with USB 2.0 and 1.1 devices; Operating System Compatibility: Windows XP / Vista / 7 / 8 / 10. 5V 4 pin connector to power USB devices from your PC power supply; The PCI-E Port only support PCI-E X1/X16 slots. Package contents: Anker USB 3.0 express card (with male power connector), installation CD, 7.9in 4-Pin to SATA cable (including connector length), instruction manual. Free lifetime technical support and 18-month manufacturer's warranty.