Trust the consistent battery performance of the Oral-B Cross Action battery toothbrush for a superior deep clean in hard to reach places. Improve your oral health by removing more plaque than a regular manual toothbrush with each use. 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.