This 3 Port PCI Express FireWire adapter card can be installed in a PCI Express slot to add two IEEE1394b (FireWire 800 - 9 pin) ports and one IEEE1394a (FireWire 400 - 6 pin) port, providing broad compatibility with a wide range of FireWire devices (e.g. DV camcorders, external hard drives, digital cameras, etc.). The 2b, 1a card features a native (single chip) PCI Express chipset - resulting in faster, more reliable and cost effective performance than expansion cards that utilize a "bridge" chip. Type: PCI Express to 1394 Card External 1394 Ports: 3x 1394 Ports Standard: 1394A/1394B Data Transfer Rate: 800/400/200/100 Mbps Operating Systems Supported: Windows 98SE/ME/2000/XP/Server 2003, Mac OS 10.2.4 and up Features: Compliant with 1394 Open Host Controller Interface Specification 1.1 Hot-swapping feature allows you to connect and discount devices without powering down the system Maximum data transfer rate of 800 Mbps Parts: 1 year limited Labor: 1 year limited