To my knowledge are the best performers, the bristles of the toothbrush in the test under the microscope. This was kaufausschlagend. The brush tüddelelütet their tune when removed from the charging station (if it depends on power, what they with me as Schwabe course not continuously do). And then after a minute in function to indicate the change of cleaning area Is the kids (2 1/2 years) well in the hand and has already survived the occasional fall from the washbasin. The battery has endured ten days holiday without problems. Would she recommend and buy again.