... a ExpressCard slot Compatible with PC & MAC systems USB TO EXPRESS card1,USB interface,Support hot-swappable2,Provide a ExpressCard slot, supports ... design ExpressCard PC cards, USB expansion cards, for example, EV-DO (3G), HSDPA (3.5G) broadband card4,Does not support the PCI Express ... and MAC systems6,Power use: DC +5 V7,NO driver USB to Express Card High Quality