onn. AC Powered USB 3.0 Hub (100009061)

This adapter should be plugged into a USB 3.0 port on your computer, additionally there is a AC adapter will need to be plugged in to esure that the device has enough power the 4 ports. You can use the device straight off a USB 3.0 port but if the port serves less than 900mAh it most likely will fail. So use the AC adapter if possible.