The PCI Express Firewire card lets you add 2 FireWire 400 ports to your desktop PC allowing you to connect IEEE 1394A FireWire devices such as digital cameras external hard drives DV camcorders printers - This PCI Express to firewire adapter reduces performance bottlenecks by offering support for data transfer rates up to 400Mbps to each port - For broad compatibility the PCIE firewire adapter supports Windows and macOS 10.10-10.13 and includes full profile and half height installation brackets