The unit works well, plug and play, but the app does with sinstalle drivers so much to do! I bought this for my driver card reader heavyweight. and unlike normal smart cards or chip is over, my card, the chip has the opposite of the picture! this is the bug I planted from my card as in the example and the LED drive and turned from red to blue so for me cétait good! (Except that the LED is also a presence detector!) Nope chip must be forward and of course up, and there, the red LED turns blue and "flashes" but the doc did not say it, I screwed up a good 1/4 hour before finding, otherwise RAS good product!