Visually see the reader exactly like a USB flash drive. However, it has two slots for an optional microSD or SD card.
Important note: Yes, it can still be used only one memory card. If two cards are inserted at the same time, the card reader does not work.
I use the card reader in conjunction with a USB OTG adapter for my Galaxy Note 10.1 2014 and my RAZR HD. So I can easily transfer the images by reader on your tablet or smartphone, for example, from a digital camera.
Yes, both of these Android devices have already used memory cards, but I do not see this every time with larger data sets. Keywords: movies and series broadcast on the tablet.
Under Windows 8.1, the card reader will be recognized easily and thanks to USB 3.0 port, the data - depending on the memory card -. With up to 50 MB / s on the card itself I have measured the with Total Commander.
My Conclusion:
Very small card reader with USB 3.0 and (important to me) microSD slot. Price without any complaint. Best Buy.