I am in love with this toothbrush. It has a 2-minute timer on it. After brushing for 2 minutes it automatically shuts off. Every 30-sec there is a brief pause to alert you to change sections of your mouth. The circle towards the bottom of the brush serves 2 purposes. The first is to tell you that the brush is charging when on the base. The second, is that, while brushing, a quadrant of the circle lights up to indicate which section of the mouth you should be one. So, one light is for section one. Two lights is for section two. Three lights is for section three. Four Lights is for section four. This toothbrush leaves my mouth feeling clean and refreshed. After using it, I won't go back to a regular toothbrush by choice. I did have to use a cheap toothbrush when on vacation and I really regretted leaving this toothbrush at home. Overall, this is an excellent toothbrush at an even better price. It has become a family favorite for oral hygiene.