This is an all-in-one USB 2.0 card reader which supports CF / MS / SD / MMC / X-Flashcard. This portable card reader instantly converts your card into a USB flash drive. Via this useful all-in-one card reader you can transfer photos music and other media and data between your computer and your cell phone digital camera PDA tablet PC digital picture frame or other digital device. This is a very useful and convenient all-in-one card reader for you. - Four memory card slots support most of memory card today - USB 2.0 Compatible - Plug-and-play no external power supply is needed - Sturdy construction and compact in size *Never detach the card reader when it is reading documents from flash memory card which would result in destruction of your data*