The IO 4 toothbrush features 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 brush heads every three months for the best results. - Offers the best cleaning experience with revolutionary technology for a professional clean feel and gentle brushing experience - Combines a unique round brush head with gentle micro-vibrations for a fresh and clean sensation, promoting 100% healthier gums within a week compared to a regular manual toothbrush - 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 Includes: 1 handle, 1 brush head, 1 travel case, 1 charger, 1 brush head holder