Excellent USB port

Item received today, well conditioned. The 2 ports purchased work wonderfully, without the need to install a specific driver on the PC. One branch, and inserting machines of interest (MP3 player, telephone cable, printer ..) Plug And Play in the tradition.
There are a few weeks, on another site, I had acquired another port USB 4-track thinking technology of this type of reliable products; it was a pain! On the same PC, the answer was in recognition an obstacle course.
But with this port one, everything is ok.

Thank you to the seller.