Arm & Hammer Spinbrush Pro Series Daily Clean battery powered toothbrush has dual action brush head technology and micro-cleaning bristles designed to give you a ‘dentist clean’ feeling and remove more plaque than an ordinary manual toothbrush. Dentists recommend that you replace the head of your battery toothbrush every three months. • Color-Wear Bristles remind you to change your brush head every three months • Removes 70% more plaque • Dual Action brush head technology • Thumb grip for better control