Somewhat unusually, the vibration of the brush head. Whether the dressing really as good as promised advertising, I can not say.
My teeth are clean after brushing, but the number brush must move more than the old Oral B with the rotating brush head.
Small impurities makes this toothbrush away better than the old one. Larger residues for example in the Zahnschwischenräumen or on top of the molars need to be removed by manually "scrubbing". This was not necessary in the old, by the greater movement of the brush head.
In my opinion, the toothbrush is a mix between manual and electric toothbrush if you look at the handling.
Bottom line, I am very satisfied. After all, the teeth are clean in 2 to 3 minutes!
