The Oral-B Revolution battery powered toothbrush is designed for a better clean. Removes Plaque With Deeper Reach Between Teeth versus a regular manual toothbrush. The Dentist-Inspired Round Brush Head gets a deep clean in Hard-To-Reach places. The round brush heads Cleans better versus a regular manual toothbrush. Having a built-in two-minute timer keeps you on schedule to ensure that you are doing the recommended 2 minute brushing of teeth that dentists recommend. The Oral-B Revolution battery powered toothbrush, can be taken on-the-go with you and just replace the batteries when need be. Best of all, it is brought to you by Oral-B—the #1 brand used by dentists worldwide.* *Based on surveys of a representative worldwide sample of dentists carried out for P&G regularly.  Do not use on children under age 3. Replace brush (head) every 3 months or sooner if brush head becomes worn.