Global Marketing Partners Syba SD-PEX-FWB PCI Express 4-Port Firewire 1394a/b Card for Desktop PC PCI-Express I/O Cards Add additional 4 ports of Firewire 1394 to your desktop computer Add 2 ports of external 1394b and 1 port of 1394a external and 1 port of 1394a internal to your desktop PC, Bilingual P1394b cable ports supported 1394a port supports up to 400 Mbps transfer rate with alpha connector 1394b ports support up to 800Mbps with beta connector