USB HUB

You can attach a hub to your USB controller, without any extra driver, to 
provide many USB ports, in order to attach all your devices to them. You 
can place the hub at a convenient location on your desk, and you won't have 
to plug and unplug devices directly on the USB controller. You can use any 
USB 2.0 or 3.0 hub, providing that it has its own external power supply. 
With a powered hub, you can attach a floppy drive or DVD drive. Do not try 
to attach such a drive directly to the NetUSBee, it may not supply enough 
current and overcurrent may occur, damaging the computer.