Philips Sonicare's patented sonic technology delivers 31,000 brush strokes per minute and drives fluids deep into the tight spaces between your teeth and along the gum line, which results in a cleaner, healthier mouth. HealthyWhite removes up to 2x more plaque than a manual toothbrush. HealthyWhite has three brushing modes to suit your needsClean, Clean and White, and Sensitive. Regular use of the clean & white mode removes stains and whitens teeth 2 shades in only 2 weeks. The sensitive mode provides a gentle but thorough cleaning for sensitive gums and teeth. Quadpacer and two-minute timer helps ensure dental professional recommended brushing time.