3 Media Slots - Mini SD + SD/MMC + Micro SD. Support SDXC up to 2TB, SDHC, SD, MMC, RS-MMC, Micro SDXC, Micro SD, Micro SDHC Card, Mini SD and UHS-I Cards.
Plug and play; Hot swapping; USB power (no need external power or battery); Supper speed USB 3.0 and backward compatible with 2.0/1.1.
Compatibility:Windows 2000/ME/XP/Vista/7/8(32bit/64bit) and MAC OS 10.X or above version.
LED indicator for working status, keep on when connected, keep flashing when transfering data.
Free lifetime technical support and 24-month manufacturer's warranty.

Overview 
mini usb 3.0 memory card reader is an innovative design that takes up almost no space in a camera bag, and you keep one Micro SD card in the card reader as a flash drive to transport it. 
Transfer your data faster than ever with premium quality Rocketek USB 3.0 card reader. 
Plug and move flexibly with the USB Interface. 
Soft blue and flashing LEDs indicate idle and data transfer status.