The Oral-B iO Laboratory electric toothbrush features the best Oral-B technology, combining a round brush head inspired by professional toothbrushes with micro-vibrating bristles for a professional-quality cleaning experience at home. The smart pressure sensor prevents you from brushing too hard or too soft to better protect your gums. The gum guard alerts you when you brush too hard. Change your Oral-B iO toothbrush head every 3 months for best results. Oral-B's BEST CLEAN with REVOLUTIONARY iO TECHNOLOGY for a professional-quality clean and gentle brushing. Combines Oral-B's unique round brush head with gentle micro-vibrations for a fresh, clean mouth feeling and 100% healthier gums in 1 week compared to a regular manual toothbrush. SMART PRESSURE SENSOR lights up red, white, or green to let you know if you're brushing too hard, too soft, or with the right pressure. 5 MODES to customize your brushing: Daily Clean, Whitening, Sensitive, Extra Sensitive, and Gum Care