Two (2) FireWire 800 ports (1394b), One (1) FireWire 400 port (1394a), and Two (2) 9-pin FireWire 800, and one (1) 6-pin FireWire 400 connectors * Complies with 1394a/1394b & Open Host Controller Interface (OHCI) 1.1/1.2 specifications * FireWire 800 data transfer rate up to 800Mbits/sec (100Mbytes/sec) and FireWire 400 data transfer rate up to 400Mbits/sec (50Mbytes/sec) * With an option to add a power adapter to ensure sufficient power supply to external power-hungry bus-powered devices * Supports up to 63 devices in peer-to-peer configuration and 32-bit & 64-bit Windows® 2000/XP/Vista/Server 2008/Windows 7/Windows 8 or later