Add 2 USB (Universal Serial Bus) 3.0 Ports to a Laptop through an Express Card Slot. The ECUSB3S22 2-Port Express Card USB (Universal Serial Bus) 3.0 Card adds 2 Super Speed USB (Universal Serial Bus) 3.0 ports to an Express Card-enabled computer system, using a 34mm form factor that will fit in both 34mm & 54mm slots,