Oral-B iO Series 8 The Oral-B iO series combines powerful but delicate microvibrations with a unique round head of the Oral-B toothbrush inspired dentist, providing a professional sense of purity every day. Smart pressure sensor helps prevent too strong brushing to protect gums and enamel. Recognizing AI with an interactive display helps to get the best cleaning of all areas of the mouth. The built-in 2-minute quadrant clock pulses every 30 seconds, providing complete cleaning. The friction-free, smooth magnetic drive system transmits energy to the hair tips, providing the purity that delights. For the best results, replace the interchangeable head of the Oral-B iO series every 3 months.