Our toothbrush offers five different modes at different vibration speeds for different comfort levels. Clean - up to 31,000 strokes per minute, along with unique bristles at the perimeter of the brush head which will flare slightly to clean the teeth and gum line.Whiten - at the perimeter of the brush head which will flare wider to whiten more surface area.Polish - at the perimeter of the brush head which will flare more vigorously for a polish effect.Massage - bristles at the perimeter of the brush head which will flare wider and add a massage motion for a gentle stimulation to the gum line.Sensitive - up to 31,000 strokes per minute, along with bristles at the perimeter of the brush head which will flare in a gentler motion for sensitive areas.