SIIG's DP FireWire 2-Port PCIe is an excellent adapter card for you to connect multiple high-speed FireWire devices to your system. It is designed to easily add two external FireWire 400 (1394a) ports to your PCI Express-enabled PC or Mac desktop computer. It supports data transfer rates of up to 400 Mb/s, and allows you to hot-swap devices (connect and disconnect) without first turning your system off. This 2-port dual profile FireWire adapter card comes with an on-board power connector to provide extra reliable power source from the system and a spare low profile bracket for low profile system chassis installations. The DP FireWire 2-Port PCIe works with any available PCI Express slots with different lane width and is a reliable cost-effective solution to connect your high-speed FireWire devices such as hard disk drive enclosures, scanners, CD-RW/DVD-ROMs, digital cameras, and DV camcorders to your PC or Mac computer.The DP FireWire 2-Port PCIe is powered by Texas Instruments chip and is fully compliant with industry standards, including PCI Express base specification 1.0a and IEEE 1394-1995, 1394a-2000 and OHCI 1.1. It is also FCC Class B (DoC) & CE regulatory approved and RoHS-compliant.The DP FireWire 2-Port PCIe is fully compatible with a wide variety of Windows and Mac operating systems.