PCMCIA Firewire 1394 Cardbus 54mm IEEE 1394 32-bit CardBus PC Card type II standard compliant Two 1394a ports : 1x 6pin and 1x 4pin Two USB 2.0 port IEEE 1394-1995 Standard compliant, for High Performance Serial Bus and P1394A Supplement 4.0 1394 OpenHCI specification V1.0 and V1.1 compliant Data transfer rate: 100/200/400 Mbps Weight package : 200Grams PC or Macintosh computer with one PC Card slot MS Windows 98SE/Me/2000/XP, Mac OS