SterlingTek's POWWER USB Compact flash card reader / writer for Canon EOS 5D Mark II The Compact flash memory Card Reader/Writer will speed up your download time! Save your precious camera batteries!! Works with CF memory Cards. "Download Up to 1.5MB/s (Macs), 12MB/s (PC's)! " "You can use the Compactflash Card Reader/Writer as a ""mini-disk-drive." Very light weight and portable. Plugs into your USB port.