So far everything is fine. We use this massager on the hair and head of our autistic grandson (8 years old) and it tolerates vibrations very well. It is almost impossible for him to cut his hair. His therapist suggested this vibrator because it resembles the sound and vibration of a hair clipper. Now he imitates the movements of a hair clipper with his own hands. As far as I know this is a success. Here's another use of this mini penguin.
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