The iO 3 electric toothbrush features the latest advancements from Oral-B, utilizing a round brush head that mimics those used by professionals, alongside micro-vibrating bristles for an exceptional clean in the comfort of your home. An intelligent pressure sensor helps you maintain the right amount of pressure, ensuring optimal care for your gums. The Gum Guard function notifies you if you are applying excessive pressure while brushing. For optimal performance, it's recommended to change your Oral-B iO toothbrush head every three months.