Lexar Professional Express Card Compact Flash Reader LRWEXPPRBNA Designed for Ultimate Performance Simply plug it into the ExpressCard slot of your laptop and the reader connects directly to the high-speed PCIe bus interface for enhanced performance This convenient and portable reader works with your MacBook Pro computer or PC notebook with a 54mm or 34mm ExpressCard slot High-speed performance allows you to drastically accelerate transfer speeds from card to computer-saving you time and money