Battery sold separately "First -finished electric toothbrush" that can be used from around 6 months Selectable 2 mode sound wave vibration and two types of step -up brushes that can be used for a long time can quickly and firmly remove dirt without unpleasant. It is a dedicated toothbrush for moms and dads gently. "2 mode sound wave vibration" that can be selected according to your child ・ First "Soft Mode": Approximately 12,000 vibration / minute (when no load) ・ If you get used to it, "solid mode": Approximately 16,000 vibration / minute (when no load) "Two types of step -up brushes" that can be used for a long time ・ Around 6 months ~ (Estimated number of teeth: 1 to 8) "Super soft fine hair" is not scratched without scratching teeth. ・ Around 12 months ~ (Estimated number of teeth: 9 ~) Remove dirt firmly with "two types of flocking brushes". A lot of brushes are included! ・ There are 3 brushes on the electric t