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