Review on ultrasonic toothbrush X-3, pink by Eva Magdolna ᠌

I was able to use it just once. After that, the brush started turning on and off by itself, which indicates that water probably got inside owing to insufficient sealing. After I started selling them on Aliexpress, I saw that their lifespan was significantly reduced. Some pros: There are a total of 4 nozzles included in the package; however, the craftsmanship is not very good, and many of them are likely to break. The button that is supposed to switch the brush on and off does not have any effect, and the brush turns on by itself. After a short period, it will switch off by itself. And this continued for a few of iterations.