Beyond sonic cleaning – the next generation of sonic oral care. The revolutionary rechargeable brush combines advanced sonic action with new ionic technology to clean your teeth more effectively than ever before. Plaque bonds to the teeth electrically by positive ions. By flooding the mouth with ions, the ion sonic loosens these bonds by temporarily reversing polarity. The plaque is then attracted to the negatively-charged bristle for removal. Delivery an incredible 40,000 brush strokes per minute, the ion sonic creates a dynamic sonic reaction that cleans teeth with extraordinary thoroughness, massaging your gums and dislodging the plaque along and beneath the gum line.