[Cord-free Power Supply] Inateck PCI-E to USB 3.0 2-Port PCI-E Express Card Desktop for Windows XP/7/8, Mini PCI-E USB 3.0 Hub Controller Adapter, with Internal USB 3.0 20-PIN Connector, Expand Another Two USB 3.0 Ports - No Additional Power Connection Needed No additional power supply for normal recognition and operation needed anymore, One Step Update your Windows Computer to USB3.0 Easily with PCI Express to USB3.0 Controller Adapter Card; 1 USB 3.0 20-pin Connector ( expand another two USB 3.0 ports ) Super Speed USB 3.0 supports transfer rates of up to 5 Gbps - The actual transmission speed is limited by the setting of the device connected. Operating System Compatibility: Windows XP, Windows 7 and Windows 8 (32/64-bit); Backwards Compatible with USB 2.0 and 1.1 devices With quick and easy installation, Enjoy copying videos, music, photos, data files between USB devices and the computer at blazing fast speeds Package: 1x USB3.0 PCI-E Expansion Card; 1x CD Driver; 1x User's Manual