this toothbrush is Innovente because it is not like any other rotary .At the beginning, but it surprises for the use that is very effective. Another point Positive feedback ratio: his head is smaller than the other which allows well go brush your molars background .It s' stops by itself after 2 minutes but it can revive immediately .Seul small problem: I find that it vibrates really hard and I wonder if it's suitable for children? Anyway, I 'buys !!