The reader does the job even issue cards without objection known and read. Allergings it is (like all USB Sticks 3) also unequipped very hot, so it can not remain in the USB output. Also (without equipment) are not well suited for a non-powered USB hub, because the device apparently constantly draws current.
Addendum: The above peculiarities persist, the fact that with this reader but without hesitation cards are detected, the realized none of my other readers, justifies the scale-up.