Features:1-Lane (x1) PCI-Express with transfer rate 2.5Gb/s full duplex channel.3x external 1394A ports (2 * 6 Pin + 1 * 4 Pin) and 1x internal 1394A port (1 * 6 Pin).Compliant with PCI-Express revision 1.0a. Compliant with IEEE 1394-1995, 1394a-2000 standard.Compliant with IEEE 1394 OpenHCI Specifications V1.0 and V1.1.Support 400/200/100Mbps data transfer rate.Allows to connect more 1394a devices to your computer easily.Attention: Don't Support hot-plugging. Before installation, Turn off the power and then plug in the power cord.3 external FireWire(1394a) ports to support DV camcorders, hard disk, removable drives, scanner, digital cameras and other FireWire devices.