Features： 1、Fully wrapped teeth, 45 degree cleaning between teeth and gingival sulcus, 90 degrees cleaning the posterior dental fossa and groove. 2、U?shaped toothbrush design, using soft food?grade antibacterial silicone material, safe, protect the child's delicate oral skin. 3、60?degree contact with gums and teeth, every brushing can bring a quick and comfortable teeth cleaning experience to the mouth. 4、Effectively protect the gums, promote periodontal blood circulation, and reduce the occurrence of periodontal diseases. 5、Adopts all?round waterproof and sealed design, IPX7 waterproof, convenient, durable and clean. Specification： Item Type: Automatic Children's Toothbrush Built-in Battery: 350mAh (Included) Rated Voltage: DC 3.7V Charging Input: DC 5V\0.5A Rated Power: 1.5W Life Time: 50 days How to use: Step 1: Squeeze the toothpaste into the toothbrush head. Liquid toothpaste or ordinary toothpaste can be used. Ordinary toothpaste must be wetted with braces before putting it in the mouth Step 2: Gently place the upper and lower teeth on the alveolar, then press the switch, shake the toothbrush left and right with your hands to touch the teeth on both sides. Step 3: Complete the tooth cleaning, clean the toothbrush, and dry it. Package List： 1 x Main Machine 1 x USB Cable