The Oclean Kids is gentle on the teeth and gums. It is also ultra-quiet at less than 37 dB. Outstanding cleaning efficiency. The magnetic levitation motor delivers up to 80,000 movements/min. Delicately designed brush head Soft bristles and small brush heads provide gentle cleaning and a bright smile. 2-minute smart timer and 30-second quad step counter. Built-in smart timer helps kids develop better brushing habits for better oral health. One-button operation. The toothbrush has a child-friendly and ergonomic design and comfortable handle. The battery lasts up to 30 days.