The Oral-B Professional Care 7000 Brush has a high speed 3D action in and out pulsations reach deep between the teeth and loosen the plaque while side-to-side rotations sweep it away. A built in “Quad timer” sends signals every 30 seconds indicating that you start cleaning another area of your teeth. The sophisticated Oral B bristles fade when it’s time for brush head replacement and the pressure sensor helps protect gums from over brushing.