Trust the consistent battery performance of the Oral-B Clinical Charcoal Toothbrush featuring end-rounded, charcoal-infused bristles. Cup-shaped bristles remove stains, such as tea and coffee, for whiter teeth. * 2-minute coaching timer. ProCore constant power delivers optimal performance every time. 2 AA batteries included. * Round cleans better. Dentist-inspired round brush head delivers superior clean. * Compatible with a variety of Oral-B refill heads for every dental need. Brush heads should be replaced every 3 months. * Oral-B is the #1 dentist-recommended toothbrush brand worldwide.