This sonic toothbrush designed to gently cleanse the teeth and massage the gums features a convenient USB-powered charging dock. Features: Designed to gently cleanse the teeth without damaging enamel Features replaceable brush heads with medium-soft nylon bristles Tooth-waved brush profile helps clean hard-to-reach areas Ergonomic grip helps provide comfortable use Smart timer function (2 minutes; 30 seconds per quadrant) Bristle width: 6mm Up to 31000 strokes per minute Maximum Power: 3W Waterp