USB Plasma Ball with 4-Port Hub allows you to connect 4 different USB devices and. It will create an unique and fun environment on your desk or workstation. The fascinating flashes between the center of and the edge of the ball. Your will feel amazing when you touch the 3-inch glass ball as the blue flashes of lightning will move to greet your fingertips. It is small enough not to take up too much desktop space and its awe inspiring light show is big enough to amaze your co-workers. Just plug this plasma ball into any USB port on your computer, switch it on and enjoy it.