The Sonicare DiamondClean Smart 9300 toothbrush Black Edition is designed to operate with the Sonicare app (Apple or Android) which keeps track of your brushing habits, providing you personalized coaching and feedback for a complete clean. The HX9903/11 incorporates Smart sensors for pressure and location readings. Smart Brush Head recognition detects the brush head being used and sets the intensity accordingly. It includes 3 Smart brush heads: a Premium Plaque Control head, a Premium White head, and a Premium Gum Care brush head. There are 4 cleaning modes: Clean, White, Gum Health, Deep Clean and 3 intensity settings. The 14-day Lithium Ion battery recharges in the charging glass. 90-day Money Back guarantee and 2-year warranty.