4 Ports Firewire 1394a PCI Card bring the cutting edge of technology to PC or Mac. This PCI card allows you to add 1 int and 3 ext. blazing fast 1394 ports. Each port is capable of handling data transfer rates up to 400Mbps and daisy-chainable up to 63 devices. Take advantage of the interface of choice for today's high-end DV camcorders, as well as external hard disks and other high-speed peripherals.