The iO2 electric toothbrush combines gentle micro-vibrations with a unique dentist-inspired round brush head for a purifying feel of a professional clean. Replace your Oral-B iO toothbrush head every 3 months for the best results. 100% cleaner teeth than a regular manual toothbrush with Oral-B's iO Technology: tough on plaque, gentle on gums Designed for an easy switch to electric brushes with only 1 touch button, quiet sound, and long-lasting battery. Protect your gums with the automatic gum pressure sensor that slows down speed and signals red when you brush too hard. Easily choose your perfect clean with 3 quiet intensity levels: extra-gentle, gentle, daily clean. Brush for dentist-recommended time with 2-min brush timer that alerts every 30 seconds to change your brushing zone. Benefit from a long-lasting battery with low-charge indicator. Oral-B round brush heads reach where rectangular manual brushes don't. Experience a better clean from Oral-B, the #1 brand most used by dentists worldwide.