... ExpressCard slot Compatible with PC & MAC systems USB TO EXPRESS card1,USB interface,Support hot-swappable2,Provide ... 54mm PC Card3,Support USB interface design ExpressCard PC cards, USB expansion cards, for example, EV-DO (3G), HSDPA ... Does not support the PCI Express interface design ExpressCard cards, such as certain eSATA, Firewire IEEE1394a / b ... DC +5 V7,NO driver USB to Express Card High Quality