This listing is for one Belkin F5U512-MAC FireWire CardBus adapter, also marked P80691-A. The card installs into a compatible 32-bit Type II CardBus/PCMCIA slot and was designed to add two FireWire 400 connections through Belkin’s external dual-port breakout adapter. It has been tested and is working properly. This listing includes the CardBus card only; the proprietary FireWire breakout adapter is not included. Belkin originally designed this version for compatible Apple PowerBook systems, with support for two 6-pin IEEE 1394a ports at speeds up to 400 Mbps when used with the proper adapter. Please compare the model number and connector with your existing hardware before purchasing. Photos show the actual card included.