The Oral‑B iO Series 4 features Oral‑B’s best technology, combining a dentist‑inspired round brush head with gentle, micro‑vibrations for a professional, purifying clean feel at home. It is clinically proven to remove 6x more plaque along the gumline versus a regular manual toothbrush. Powered by Oral‑B’s magnetic iO technology, the Series 4 delivers a smooth, harmonious brushing experience—effective yet gentle on teeth and gums. With 4 Smart Cleaning Modes—Daily Clean, Whiten, Sensitive, and Super Sensitive—the iO Series 4 lets you personalize your brushing experience. A built‑in 2‑minute timer with quadrant pacing, a visible pressure sensor, monitor battery level, and signal when it’s time to replace your brush head. Best of all, it’s 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.