This pci usb 20 adapter card adds two external usb 20 ports as well as one internal usb 20 port through simple installation in a single pci slot the pci usb 20 card supports plug and play installation as well as hot swappable connectivity with usb 20 devices ensuring convenient hassle free connections without having to reboot the computer the pci usb 20 adapter card features a low profile design thats suited for small form factor cases