Before that, there was a philips sonicare brush, the manufacturer assured that water could not get into the toothbrush, but in the end it got in, because of this it failed a year later, I bought the brush for 12 thousand. They began to look for an alternative and now a new brush has appeared from xiaomi, the essence of the work is exactly the same and even better, for example, the design and equipment left positive emotions, I liked how it cleans my teeth, I will recommend it to friends.See full review