The iO Laboratory electric toothbrush offers advanced technology, combining a dentist-inspired round brush head with micro-vibrating bristles for a professional clean feeling at home. The smart pressure sensor prevents you from brushing too hard or too softly, protecting your gums and ensuring optimal cleaning. The Gum Guard alerts you if you apply too much pressure while brushing. Replace your iO Series refill brush heads every three months for the best results. Experience the ultimate cleaning with revolutionary iO technology for a professional clean feel and gentle brushing experience. It combines a unique round brush head with gentle micro-vibrations for a fresh, clean sensation and 100% healthier gums within a week compared to a regular manual toothbrush. Choose from 5 brushing modes to personalize your brushing: Daily Clean, Whitening, Soft, Super Sensitive, Gum Care. The enhanced smart pressure sensor lights up red, white, or green to indicate if you are brushing too hard, too softly, or with the right pressure. Contents: 1 iO handle, 2 brush heads, 1 charger.