Experience professional-level cleaning with Philips Sonicare DiamondClean 9900 Prestige, model HX9990/11. This premium electric toothbrush combines SenseIQ technology and advanced AI app integration for a truly personalized clean. The A3 Premium All-in-One brush head removes up to 20x more plaque than a manual toothbrush, while Sonicare Fluid Action and 62,000 bristle movements per minute drive cleaning power between teeth and along the gumline. Real-time sensors monitor pressure, motion, and every brushing zone, instantly adjusting intensity to protect your gums. Choose from five brushing modes and three intensity settings—plus get progress insights and reminders from the connected app. Complete with a travel charging case, Champagne finish, and smart brush head replacement alerts, the DiamondClean 9900 Prestige delivers a best-in-class brushing experience.