The Pinnacle Systems Booster 2 B PCI Firewire Card is ainterface card that provides two external Firewire ports and 1 internal port for connecting various devices. This card is compatible with PCI and FireWire 400 ports, making it a versatile option for expanding the connectivity of a computer. With the trusted Pinnacle Systems brand and reliable performance, this card is a great addition for those looking to enhance their computer's interface capabilities.