Siig 2-Port FireWire ExpressCard. Host interface: ExpressCard, Output interface: ExpressCard 34mm, Connector(s): 2x 1394a 6-pin. Data transfer rate: 400 Mbit/s. Certification: ROHS. Colour of product: Silver. Platform: PC, MacBook Pro, Connectivity technology: Wired, Compatible operating systems: Windows 7, Vista, XP, Server 2003, 2008, 2000 Mac OS X 10.4.6 +