Bus Type: Express Card/34 Speed: Super Speed (5 Gbps), High Speed (480 Mbps), Full Speed (12 Mbps) & Low Speed (1.5 Mbps) Supports USB (Universal Serial Bus) 3.0, USB (Universal Serial Bus) 2.0, & USB (Universal Serial Bus) 1.1 devices Connectors: 2 x Type A USB (Universal Serial Bus) Female Chipset: NEC Built-in power jack for optional adapter for use when the connected devices require additional power from the USB (Universal Serial Bus) 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 Super Speed USB (Universal Serial Bus) ports with this 2 Port USB (Universal Serial Bus) 3.0 Express Card. It is ideal for connecting extra USB (Universal Serial Bus) peripherals such as printers, scanners, drive housings to your notebook or laptop.