The Philips Sonicare Prestige 9900 with SenseIQ technology is the most advanced sonic toothbrush in the range, ideal for adults who want the best possible clean and are ready to upgrade their routine. Paired with the A3 Premium All-in-One brush head featuring multi-angle bristles, it delivers up to 2000% more plaque removal¹, up to 1500% healthier gums², and up to 100% more stain removal³ for a professional clean feeling every use. SenseIQ technology senses pressure, motion, and coverage up to 100 times per second; if you apply too much pressure, the toothbrush will automatically adjust the intensity level to protect your teeth and gums. Behind that intelligence is a motor delivering 62,000 bristle movements per minute, while Sonicare Fluid Action drives fluid deep between teeth and along the gumline. A light ring at the base gently alerts you when you're pressing too hard. Choose from 15 brushing settings across five modes, Clean, White, Gum Health, Deep Clean+, and Sensitive, and adjust to one of three intensity levels for a customized clean. The Sonicare toothbrush and app pair seamlessly to deliver guided brushing, tips and tricks, and content personalized to you. A replacement reminder tracks how often and how hard you brush, then alerts you when it's time for a new brush head. With up to 14 days of regular brushing on a full charge, the included charging travel case keeps your routine on track wherever you go. ¹ vs. a manual toothbrush ² vs. a manual toothbrush in 6 weeks ³ in lab test vs. a manual toothbrush