The Oral-B Genius 9100S Black helps you improve your brushing technique with the help of an app. The toothbrush is equipped with Bluetooth and connects to the Oral-B app. Through the app you can read how long you have to brush each zone. You also get a signal if you press too hard on the toothbrush. Handy, because that way you won't damage your gums. You choose from 5 different brushing positions, including a massage position and a position for whiter teeth.