... slot Compatible with PC & MAC systems USB TO EXPRESS card1,USB interface,Support hot-swappable2,Provide a ExpressCard ... supports ExpressCard 34/54mm PC Card3,Support USB interface design ExpressCard PC cards, USB expansion cards, for example, EV-DO (3G), ... HSDPA (3.5G) broadband card4,Does not support the PCI Express interface design ExpressCard cards ...