Watch with amazement as the electricity follows your finger tips. The USB Plamsa Ball creates a unique environment on your desk or work station that will impress your co-workers and friends.The USB Plasma Ball is small enough to not take up too much desktop space and yet big enough to amaze your co-workers with its awe-inspiring light show at the touch of your finger. The USB Plasma Ball does not require batteries and is powered entirely by your computer"s USB port.