Amazon.com: Oral B iO Series 3 Electric Toothbrush with (1) Brush Head Oral B iO Series 3 Electric Toothbrush iO3 3 Modes Refill Change Oral B iO Series 3 Electric Toothbrush Oral B Oral B iO Series 3 Ice Blue Ultimate Clean Electric Toothbrush with 3 Oral B iO Series 3 Electric Toothbrush Duo Edition Ice Blue & Matt. Key Features Oral Bs revolutionary iO technology removes up to 100% more plaque* for healthier gums 3 Smart Modes to personalize your brushing: Daily Clean, Whitening, Sensitive Smart Pressure Sensor signals red, white or green to alert you if youre brushing too hard, too softly or with just the right pressure. Smart Ring flashes a 360 ring of colors to celebrate completion of a dentist recommended 2 minutes of brushing iOs smart tracker reminds you when the brush head needs to be changed with a yellow LED light, to keep your clean at its best *vs regular manual toothbrush