I thought it was an LED mouse, but no, it has a ball in it. However, it works even better than the LED mouse that I had which quit working . So I am very happy with this mouse, and it doesn't "disappear" from the screen from time to time like the LED mouse I had was doing. It fits my hand better than my old mouse and is very comfortable. It has the roller which is also a third button when you press down on it. I would definitely buy it again!