The Oral-B iO 4 offers a refreshing feeling of cleanliness and 100% healthier gums in just one week. The brush provides surprisingly gentle cleaning and operates quietly. It removes up to 100% more plaque compared to a regular toothbrush. Inspired by dentists, the unique round brush head cleans perfectly with the help of micro-vibrations as well as rotating and oscillating movements. The crossed bristles are angled at 16° and positioned to wrap around each tooth for maximum cleaning and effective plaque removal along the gum line. The smart pressure sensor lights up red when you brush too hard and green when you are brushing correctly.