... speakerssupport CF,SD,MMC,MS card number of color :16.7Mtwo piece of keys available product features:1 outer shell ... CF,SD, MMC,MS card and USBUSB: high speed USB 2.0 (host) applicable fields1 business organizations : supermarket,large-scale ... large-scale sales, star-rated hotels,restaurants,travel agencies,pharmacy.2 financial organizations: banks ,negotiable securities,funds, insurance companies3 Non ...