From Oral B
•The Oral-B iO Series 3 electric toothbrush features Oral-B’s best technology, combining a dentist-inspired round brush head with micro-vibrating bristles for a professional purifying clean feel at home. The Smart Pressure Sensor helps prevent you from brushing either too hard or too softly to better protect your gums. Replace your Oral-B iO Brush Head every 3 months for best results.