This 3 Port PCI Low-Profile/Half-Height 1394a FireWire Adapter Card turns a motherboard PCI slot into two external IEEE 1394a FireWire slots (1x6-pin, 1x4-pin), and provides an internal (6-pin) FireWire port that can be used in place of the external 6-pin connector - a cost-effective solution that lets you connect any FireWire 400 device to your desktop computer. Compatible with either Mac or PC computers, the 1394a FireWire card can be installed in small/micro form factor computer cases, and includes both standard and low profile/half-height brackets for easy installation.