The Oral-B iO 2 electric toothbrush uses gentle micro-vibrations and a dentist-inspired round brush head to deliver a professional-feeling clean. Replace the brush head every 3 months for best results. 100% cleaner teeth than a regular manual toothbrush with Oral-B iO technology — tough on plaque, gentle on gums. Designed for an easy switch to electric with a one-touch button, quiet operation and a long-lasting battery. An automatic gum pressure sensor slows the brush and signals red if you brush too hard. Choose from three quiet intensity levels: extra-gentle, gentle and daily clean. Brush for the dentist-recommended time with a two-minute timer that alerts every 30 seconds to change your brushing zone. Low-charge indicator included. Oral-B round brush heads reach where rectangular manual brushes don't — the #1 brand used by dentists worldwide.