This 2 Port Express Card Fire Wire Adapter Card adds two 1394b Fire Wire ports to a laptop computer, providing a cost-effective way to add IEEE 1394A & IEEE 1394B Fire Wire devices even if the laptop doesn't have a built-in Fire Wire 400 or Fire Wire 800 port. Simply insert the IEEE 1394B Fire Wire 800 card (EC1394B2) into an Express Card slot, & you'll be able to connect a broad range of Fire Wire devices to your laptop, while relying on data transfer speeds of up to 800 Mbps. Plus, the card is backward compatible with 1394a devices, so you can connect both Fire Wire 400 & 800 devices to the notebook, using the same adapter.