LONG RECHARGEABLE BATTERY LIFE: This rechargeable sonic toothbrush is a high-level safe product as it works with a durable Li-battery and battery life last for 30 days after being fully charged. It is waterproof and can be used in the bathtub or shower. BPA-FREE. (Designed in the U.S.). 3 BRUSHING MODES DESIGNED SPECIFICALLY FOR KIDS: Built-in 3 modes with memory function(Clean, White, Massage), which are designed according to kids' oral and dental characteristics, GENTLY clean kids' gums and teeth. RIGHT BRUSHING HABITS: These kids' toothbrushes are equipped with a 2-minute automatic timer and 30-second pulse reminders that instruct kids to brush the next quadrant of the mouth and help develop dentist-recommended brushing habits. MAKE BRUSHING FUN: 3 brushing modes and the cute dog is perfectly designed to make brushing easy and fun for children. Soft bristle & High-quality silicone Brush heads provide kids with a better brushing experience. SAFE BRUSHING: Soft bristle & Food Grade brush heads are selected with strict criteria to suit kids' teeth topography for thorough cleaning of gums. The anti-slip silicone handle was made by High-Quality CPE hybrid materials to ensure optimal vibrating speed and enable maximum reach to all teeth.