USB SD Card Reader,Truly plug and play, hot swappable Full speed USB ... or V2.0 connectivity Read and write the flash memory card at 480Mb/Second Compatible with SD, Mini SD, MMC, Truly ... , no external power supply is needed Power LED Indicator No drivers required Low Power Consumption Dimensions : 73 x 28 x 7mm ... Colour : blue or you choose AL-SCR21 SD card reader/mmc card reader/card reader