Charging using USB is safe, fast and convenient, and can be easily used at home or during travel. U-SHAPED TOOTHBRUSH HEAD : U-type toothbrush head made of food-grade silicone is very soft ,specially designed for children's tender gums and sensitive teeth.An extra toothbrush head is provided, you can trim it as needed. Our children’s sonic toothbrush adopts a waterproof sealing design. It is convenient to use even in the shower, without worrying about water damage. Please keep the toothbrush body dry while charging. Automatic children's toothbrush has 3 modes to clean teeth and gums, brush head filled with mouth can clean all areas. Can be timed 59 seconds of scientific brushing, do not have to worry about children brush teeth lazy. This toothbrush is designed like a cute toy with beautiful Chinese music, allowing children to enjoy brushing their teeth like a game. Also, it is a powerful electric toothbrush for kids.