[High-quality material] U-shaped toothbrush head is made of food-grade silica gel, which is soft, non-toxic and non-toxic. The deprivation of childrens rights is designed specifically for children. Each tooth is heard by the soft silicone bristles, which cleans the teeth to a certain extent. [3 working modes] There are 3 cleaning modes, which can be easily dealt with by a single flavor, which is aimed at specific cleaning needs. [Ultrasonic technology] 24000 rpm ultrasonic cleansing, cleansing teeth does not stick to glue. [Dual light design] Combining the development of ultraviolet light, red light and blue light, everyone can identify different dental problems. [Convenient and safe design] IPX7 waterproof design, U-frnech channel and mouth corners are super easy to brush. PowerfulOne machine with multiple functions, timely remove stains, plaque, bacteria, whiten teeth. Impact: 1) The normal operating temperature of the production cost is 0-50C. 2) When charging the product, please charge at room temperature for product characteristics. 3) When the product is not used for a long time, charge and discharge once every three months. 4) Keep the product in the same shade and avoid direct sunlight. 5) After brushing your teeth, cover it with a damp cloth to keep the water consistent with the stagnant water, and try to protect it even in the water. 6) The output power of this product is large, please do not work for a long time, generally no more than 10 minutes. 7) Please keep the case dry. Learning steps: 3 modes: gentle massage mode: gentle cleansing, alleviating the need for gums. The best frequency is 63 beats per minute. The best frequency is 63 beats per minute. Specifications: Material: Silicone Voltage: DC5V Charging time: 2 hours Use time: about 7 days Charging indicator: The blue light flashes, charging, the battery cover will stop after being fully charged. Waterproof: IPX7 Mode: 3 Color: Yellow Applicable age: 2- 7 The length of the old USB cable: 65 5 cm The package includes: 10.9 x 5.1 x 4.4 cm Electronic toothbrush x 1 USB data cable x 1 User manual x 1