Trust the consistent battery performance for Clean toothbrush to remove plaque and whiten teeth by removing surface stains. The Precision Clean round brush head is inspired by dental professional tools for a tooth-by-tooth clean, with specially engineered bristles for optimal tooth coverage. 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.