Philips Sonicare DiamondClean 9900 Prestige Electric Toothbrush – with SenseIQ Technology and Advanced AI App, 5 Brushing Modes, 3 Intensity Levels, Charging Travel Case,Midnight Blue, Model HX9990/12

Price: $369.79
(as of Jul 19, 2026 11:38:24 UTC – Details)


Experience the most advanced sonic toothbrush in the range: Philips Sonicare Prestige 9900 with SenseIQ technology. Paired with the A3 Premium All-in-One brush head featuring multi-angle bristles, it removes up to 20x more plaque than a manual toothbrush. It also helps achieve 15x healthier gums in six weeks² and up to 100% more stain removal in less than two days³.

SenseIQ Technology senses your 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.

This Philips Sonicare toothbrush cleans gently yet effectively and cares for your teeth and gums with up to 62,000 bristle movements per minute. Sonicare Fluid Action supports the bristles to clean by driving fluid deep between teeth and along the gumline. A light ring that gently lets you know if you’re overdoing the pressure.

Enhance your oral care routine with 15 brushing settings. Select from five modes – Clean, White, Gum Health, Deep Clean+, and Sensitive – and adjust to one of three intensity levels for a customized clean.

Achieve your oral health care goals with the Sonicare toothbrush and app. Benefit from guided brushing, tips and tricks, and content personalized to you. Together, you are unstoppable.

Did you know that brush heads become less effective after three months? The replacement reminder tracks how often and how hard you brush, then reminds you to replace your brush head once it’s time for a new one.

Every detail of this Philips toothbrush is crafted with attention to detail by dedicated designers and engineers. Plus, with the included charging travel case, you can maintain your oral care routine, even while on the go.

Experience up to 14 days of regular brushing on a full charge, bringing a new level of convenience to your daily routine.

¹ vs. a manual toothbrush
² vs. a manual toothbrush in 6 weeks
³ in lab test vs. a manual toothbrush
⁴ except for Philips One
Product Dimensions ‏ : ‎ 2.91 x 6.61 x 6.61 inches; 14.29 ounces
Item model number ‏ : ‎ HX9990/12
Batteries ‏ : ‎ 1 Lithium Ion batteries required. (included)
Date First Available ‏ : ‎ March 11, 2021
Manufacturer ‏ : ‎ Philips Sonicare
ASIN ‏ : ‎ B08YCVJKXV
Best Sellers Rank: #19,433 in Health & Household (See Top 100 in Health & Household) #48 in Sonic Toothbrushes
Customer Reviews: 3.9 3.9 out of 5 stars (1,292) var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
A3 Premium All-in-One brush head removes up to 20x more plaque than a manual toothbrush; achieve 15x healthier gums in six weeks², and up to 100% more stain removal in less than two days³
SenseIQ Technology senses your pressure, motion, and coverage up to 100 times per second; if you apply too much pressure, the toothbrush will adjust the intensity level to protect your teeth and gums
Gentle yet effective clean with up to 62,000 bristle movements per minute; Sonicare Fluid Action supports the bristles to clean by driving fluid deep between teeth and along the gumline
This electric toothbrush for adults has a light ring at its base that gently lets you know if you’re overdoing the pressure; simply ease off when it lights up to help your gums stay protected
15 brushing settings: select from 5 modes – Clean, White, Gum Health, Deep Clean+, and Sensitive – and one of three intensity levels for a personalized clean; select your preferences in the app
Achieve your oral health care goals with the Sonicare toothbrush and app: the two pair seamlessly to deliver guided brushing, tips and tricks, and content personalized to you
Brush head replacement reminder tracks how often and how hard you brush, then reminds you to replace your brush head once it’s time; dental professionals recommend changing your brush head regularly
Rechargeable toothbrush providing up to 14 days of regular brushing on a full charge; with the included charging travel case, you can maintain your oral care routine, even while on the go
The set includes: 1x Prestige 9900 sonic electric toothbrush, 1x A3 Premium All-in-One brush head, 1x charging travel case, 1x charging stand, 1x USB cable

Product summary

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