4 Ports USB 3.0 Hub is a device to add 4 more Super Speed USB 3.0 Ports to your PC or Notebook. The hub has magnet feature which allow you to stick the hub to the metal part besides your notebook or PC. The hub can be stick at the position easily. The maximum data transfer rate is about 5 GB per second. The sizeis copact so you can easily carry it with you anywhere.