The price was also cheap and satisfied, but it got stuck in use, it was a time to replace the battery and when the cover was removed, the cover O ring was stretched and the battery positive side was corroded. The cap side seal is removed every time it is used, but there is no problem. I think that it is a mistake of initial battery insertion, I think that we will re-purchase the main body, because four preliminary brushes are left, including the original attached, preliminary purchase. Please also consider delivering and selling packing.
Until now I used an ultrasonic type toothbrush, but since I made it without a substitute brush, I purchased Monotaro's sonic toothbrush. Because the price is about 10%, I think that it will not be a contrasting comparison. Ultrasonic type Although there is not a feeling of slipperiness after using, it is better than being polished by hand, it can be purchased at an affordable price so I will use this sonic toothbrush for a while for the future.