My second Oral-B has a Andruckkontrolleuchte. To which I could easily do without. Only the most significant pressure on the brush, the lamp triggers. Both models have trigger a completely superfluous smartphone app that does nothing more than a timer with two minutes after akkustischem recognizing the toothbrush noise. This only works in the otherwise noise-free bathroom. In addition, the brush is already every 30 seconds a short pulse, so that all four jaw segments to brush approximately uniformly within 2 minutes. After the two minutes still follows a slightly longer pulse. Of course, you can also brush three or four minutes without the enamel will be damaged.
My tip: Looking from the respective inexpensive model and try out the different brush heads through. The more technical bells and whistles in my opinion, absolutely unnecessary. My dentist is also believes that the new, extremely expensive ultrasound toothbrushes achieve a better cleaning effect.