The Hydrosonic Pro sonic toothbrush from the Swiss oral care manufacturer, Curaden (Curaprox). 22,000 to 42,000 sonic vibrations per minute: 7 intensity levels Easy operation with one button: on/off and intensity level changes One charge: Long-lasting battery that can be used for 2 weeks with 4 minutes of use per day Efficient and thorough plaque removal with ultra-high density bristles The intensity level can be changed with one touch, so even those who have stopped using electric toothbrushes because they are not used to the vibrations can use it comfortably. In addition, while the number of bristles on a general toothbrush is about 500 to 800, this product has 5,460 bristles, which is about 10 times more. The soft yet elastic bristles enter the unevenness of the tooth surface and the gaps between the teeth, firmly removing plaque. Furthermore, three types of brushes are available to choose from depending on the purpose, so you can use them according to your oral health condition and tooth alignment.