?It is an electric toothbrush with a built-in AAA battery. When the toothbrush is not working, please replace the battery in time. ?IPA7 waterproof sealing design is adopted, kids can also use it when bathing, the electronic toothbrush can be placed under one meter depth of water and soaked about 15 minutes, but without any damaged. ? the automatic toothbrushIt is designed according to the shape of the teeth. When the child puts it in the mouth and gently bites, the gentle vibration can brush every tooth of the child. ?U-Type brush head is made of food-grade silicone, the soft head to massage kid’s teeth, especially suitable for kids tender gums and sensitive teeth. ?The cute cartoon design make the kids toothbrush lovely, the automatic toothbrush attractive to all 2-7 years kids, they are willing to brush their teeth with the ultrasonic toothbrush.