The ECUSB3S22 2-Port ExpressCard USB 3.0 Card adds 2 SuperSpeed USB 3.0 ports to an ExpressCard-enabled computer system, using a 34mm form factor that will fit in both 34mm and 54mm slots, along with ports mounted side-by-side to provide room for easy access. USB 3.0 supports data transfer rates up to 5 Gbps (10x faster than USB 2.0) and is able to provide more power per port, to help support faster and more powerful devices. Also, this ExpressCard Adaptor is backward compatible with USB 2.0/1.x, so all of your existing devices will still work. This card is backed by a StarTech.com 2-year warranty and free lifetime technical support. SuperSpeed USB 3.0 connectivity at up to 5 Gbps, while still backwards compatible with USB 2.0/1.x. Dual ports mounted side-by-side for easy access even for cables/devices with wide plug housings. Includes an optional external power connector that allows for more power for high-powered USB peripherals. Laptop users looking to extend the life of their older mobile computers by adding USB 3.0 connectivity. Expand on your laptop expansion capabilities with additional USB ports. Professionals or home users looking to expand a laptops storage capabilities with high performance USB 3.0 external storage devices for large videos/images/etc. IT professionals looking to backup or archive large amounts of data off of a laptop quickly.