Elevate your oral care with the Philips Sonicare DiamondClean 9900 Prestige, model HX9990/12, in Midnight Blue. Featuring the advanced A3 Premium All-in-One brush head, it delivers up to 20x more plaque removal, 15x healthier gums in six weeks, and up to 100% more stain removal than a manual toothbrush. Smart SenseIQ technology monitors your pressure, motion, and coverage up to 100 times per second, adjusting intensity as needed for gum protection. With up to 62,000 bristle movements per minute, Sonicare Fluid Action reaches deep between teeth and along the gumline. Choose from 5 brushing modes and 3 intensities, and use the AI-powered app for custom tips, progress, and reminders. The integrated light ring signals when you brush too hard, and the system tracks and reminds you to replace your brush head for the best results. Includes a stylish charging travel case for total convenience.