Improve your gum health up to 100% better than a manual toothbrush with the ProtectiveClean 5100 rechargeable electric toothbrush. It has a pressure sensor that protects teeth and gums from excess brushing pressure. Brush heads wear out over time. Our BrushSync technology tracks how long you have been using your Optimal Gum Care brush head and how hard you have been brushing. Your electric toothbrush will beep to inform you when to replace your brush head.