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The Philips Sonicare Prestige 9900 Electric Toothbrush with SenseIQ improve on the sonic technology with intelligence, sensing and adapting for holistic care so you always get it right. As you brush, SenseIQ technology senses coverage, pressure, motion, and other aspects, taking the guesswork out of brushing modes.


Exceptional Care Personalised to You

 Product Hero


Senses, Adapts, Cares

Clean without compromise with the A3 All-in-One brush head. It has angled bristles to remove more plaque even in hard-to-reach areas. Triangular tips work to remove more stains in less than 2 days, while longer bristles clean deep for gums that are noticeably healthier in a matter of weeks.


Personalised Guidance

The Philips Sonicare app is powered by artificial intelligence and works in perfect harmony with the toothbrush. Use it to brush with real-time guidance about pressure, motion, coverage, duration, and frequency.


Go-anywhere Style

When it is time to charge the toothbrush, simply place it on the charging base. Moreover, the included compact travel case can be slipped into any bag for carefree portability and organisation while away from home.

What's In The Box?

  • 1x Philips Prestige 9900 Handle
  • 1x Premium All-in-One BH
  • 1x Tongue Care
  • 1x Premium Base Charger
  • 1x USB Travel Case


Barcode (GTIN) 8710103968610
Product Type Toothbrushes
Brand Philips
Model HX9992/21
Colour Champagne
Product Width (cm) 2.9
Product Depth (cm) 2.8
Product Height (cm) 17.3
Weight (kg) 0.4
Manufacturers Express Warranty (months) 24

If you feel your product has failed a Consumer Guarantee (as defined by Australian Consumer Law) then you can:

  • Return it to your local Harvey Norman store to initiate an inspection / service call.
  • If it is a downloadable product (software or e-Gift Card) please Contact Us at Harvey Norman Online.
  • For flooring products: Returns are accepted for change of mind or oversupply quantities in the follow circumstances.
    • in full pack quantity only
    • in original packaging
    • undamaged/unopened
  • Please Note: Customer Direct products cannot be returned at Harvey Norman franchised stores. For all Customer Direct purchases, please Contact Us at Harvey Norman Online.

  • Dental Care Buying Guide

    Matching the right toothbrush or water flosser to your daily dental routine can be tricky. Our buying guide takes you through a range of product types, highlighting their benefits and features to help you purchase the right products for a bright white smile.

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With Product Care you can relax knowing Your purchase comes with additional protection.

Discover all of the benefits Product Care® brings you:


Product Care Replacement Plans are available on selected products. If, during the Product Care Term, Your Product fails to operate as a result of an Eligible Fault, We will provide a one-off replacement of Your Product.

Product Care Coffee Plans are available for selected coffee machine products. If, during the Product Care Term, Your Product fails to operate as a result of a First Eligible Fault, We will repair Your Product.

If, during the Product Care term, after the occurrence and repair of the First Eligible Fault, Your Product fails to operate due to another Eligible Fault, We will provide a one-off replacement of Your Product.


Our experienced support team ensures that the assessment, repair or replacement process under Your Product Care is a convenient experience. Whether You are experiencing a product fault or needing toll free technical assistance. Our team is here to provide support every step of the way.


Having Product Care® with your purchase means you can enjoy a range of special benefits that are exclusive to you and will help you enjoy the experience of your new product even more.

There are exclusions and limitations to Product Care. This section should always be read in conjunction with the Terms and Conditions for Product Care® Coffee and Replacement (Electrical).

Learn more about Product Care®.

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Philips Sonicare Prestige 9900 Electric Toothbrush with SenseIQ - Champagne
HX9992/21 8710103968610

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