This 3 Port PCI IEEE 1394a/b FireWire Adapter Card turns a PCI slot into two FireWire 800 (IEEE 1394b) ports and one FireWire 400 (IEEE 1394a) port - a cost-effective solution that lets you connect FireWire 800 devices as well as older FireWire 400 devices to your desktop computer.A versatile FireWire solution, the adapter card works in both 5v and 3.3v PCI slots and in 64-bit and 32-bit environments, making it easy to create a high-speed laptop digital media center, or connect demanding FireWire peripheral devices such as portable hard drives, DV camcorders, digital cameras and CD-RW/DVD-RW drives.This high quality adapter card is designed to provide reliable FireWire 800 and FireWire 400 connections, and is backed by StarTech.coms Lifetime Warranty.