... card readerHigh Speed USB2.0, Compliance with USB 1.1Full data transfer rate up to 480MbpsLED for bus activity from USB port ... , View and edit the data directly one the readerDrag and drop files between cardsUSB specification ... Supply ,No external power supply requiredPlug and play,high speed data tranferSupport high speed card, Slim size ,easy for carryTransfer files ...