Bus Type: ExpressCard/34 Speed: SuperSpeed (5Gbps), High Speed (480Mbps), Full Speed (12Mbps) and Low Speed (1.5Mbps) Supports USB 3.0, USB 2.0, and USB 1.1 devices Connectors: 2 x Type A USB Female Chipset: NEC Built-in power jack for optional adapter for use when the connected devices require additional power from the USB port Software Compatibility: Windows Vista (32/64bit), XP, Server 2003/8 (32/64), Windows 7, 8 2 Year warranty Easily upgrade your computer or add additional SuperSpeed USB ports with this 2 Port USB 3.0 ExpressCard. It is ideal for connecting extra USB peripherals such as printers, scanners, drive housings to your notebook or laptop.