Feature:1. PBT soft brush are designed to care for the gums, and the brush head is small and deeply cleans the back teeth.2. 6000 times/minute, silent sound waves, gentle cleaning, low‑frequency vibration, reduce gum pressure, and do not hurt your baby's gums.3. Whole body waterproof design, integrated molding process, the whole body can be washed, easy to clean, and it is safe to use.4. With cute cartoon patterns, it can increase your baby's interest in brushing teeth and cultivate good brushing habits.5. Brushing order is to brush the outside first, then the occlusal surface, and finally inside; first left and then right, up and down, outside and down, and outside and inside.Specification:Item Type: ToothbrushMaterial: PP + PBT Brush HairProduct Power: 1WRotation Frequency: 6000 Times/MinPower Supply Mode: 1 x AA Battery (Battery Not Included)Weight: Approx. 87g / 3.1ozProduct Size: Approx. 178x26mm / 7.0x1.0inHow to Use:Unscrew the cover with screws, install an AA battery (not included), and press the button on the bottom to use it.Package List:1 x Host (Battery Not Included)2 x Brush HeadNote:1. Please allow 0‑1 inch error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.