StarTech.com 2 Port ExpressCard Laptop 1394a Firewire Adapter Card. Host interface: ExpressCard. Data transfer rate: 400 Mbit/s. Width: 150 mm, Depth: 245 mm, Height: 66 mm. Packaging width: 76.00 mm, Packaging height: 245.00 mm, Package weight: 0.18 kg. Connectivity technology: Wired, Compatible operating systems: Windows 2000/ XP(32/64bit)/ 2003(32/64bit)/ Vista(32/64bit)/ 7(32/64bit), & Linux, Power requirements: 12V (1A)