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For a consistently clean feeling, the Oral-B iO series blends strong yet mild micro vibrations with Oral-B's exclusive round brush head design, which was inspired by dentists. In order to preserve your gums and enamel, the clever pressure sensor helps prevent you from brushing too vigorously. Using an interactive color display, 3D teeth tracking and artificial intelligence identification can help you achieve the finest possible clean for every part of your mouth. Included is a built-in 2-minute quadrant timer that pulses every 30 seconds to guarantee a thorough clean. The bristle tips receive energy transfer via the frictionless, smooth magnetic drive system for an outstanding clean. For optimal performance, swap out your Oral-B iO series replacement brush heads every three months.