Philips Sonicare DiamondClean 9000 Sonic electric toothbrush with app

HX9911/39

Whiter teeth in just 1 day*

  • Removes up to 10 x more plaque* for a deep clean
  • Hard on plaque, gentle on your gums
  • Start and keep up healthy habits
  • Personalised brushing experience
  • BrushSync automatically selects the best mode for you
See all benefits

Philips Sonicare DiamondClean 9000 Sonic electric toothbrush with app

Whiter, healthier teeth for life

Philips Sonicare's best whitening in our most elegant sonic electric toothbrush. Switch to Philips Sonicare.
Removes up to 10 x more plaque* for a deep clean

Removes up to 10 x more plaque* for a deep clean

Know you're getting the deepest possible clean with the C3 Premium Plaque Control toothbrush head. The soft, flexible bristles are designed to curve around the contours of your teeth, giving you 4 x more surface contact** and up to 10 x more plaque removal from hard-to-reach spots.

Hard on plaque, gentle on your gums

Hard on plaque, gentle on your gums

The C3 Premium Plaque Control toothbrush head is designed to give you your deepest clean yet. Soft, flexible sides and bristles perfectly curve around the contours of your teeth, giving you 4 x more surface contact and helping target hard-to-reach spots*.

Start and keep up healthy habits

Start and keep up healthy habits

The DiamondClean 9000 electric toothbrush gives you the guidance you need to improve and maintain healthy brushing habits in between dentist check-ups. Built-in smart sensors let you know when you're using too much pressure, and by connecting your brushing experience to the Sonicare app, a personalised Progress Report helps you stay on track and see how much you've improved over time.

Personalised brushing experience

Personalised brushing experience

The DiamondClean 9000 electric toothbrush comes with Clean, White+, Gum Health and Deep Clean+ to take care of your brushing needs. Clean mode is for exceptional everyday cleaning, White+ is for removing stains, Gum Health provides a gentle yet effective clean for gums and Deep Clean+ gives you an invigorating deep clean. Three intensities allow you to choose between a higher setting to boost your clean and a lower one for more sensitive mouths.

BrushSync automatically selects the best mode for you

BrushSync automatically selects the best mode for you

Smart toothbrush heads ensure you're using the right mode and intensity for the best possible clean. For example, let's say you're using the W3 Premium White toothbrush head. Your DiamondClean 9000's BrushSync technology will automatically sync your toothbrush head with the White+ mode to help whiten your teeth.

Lets you know if you're pressing too hard

Lets you know if you're pressing too hard

You might not notice if you're brushing too hard, but your DiamondClean 9000 will. If you need to ease up, the electric toothbrush will make a pulsing sound. It's a reminder to let your toothbrush head do the work. 7 out of 10 people found this feature helped them become a better brusher.

Always know when to replace your brush heads

Always know when to replace your brush heads

All toothbrush heads wear out over time, so you'll want to keep an eye on yours to make sure you're still getting a great clean. Our BrushSync technology tracks how long you've been using your toothbrush head for and how hard you've been brushing. The BrushSync replacement reminder on your handle and a short beep remind you when it's time to replace it.

Simple to charge and style to boot

Simple to charge and style to boot

Your DiamondClean 9000 electric toothbrush will last for up to two weeks on a single charge with regular use.

Technical Specifications

  • Product Update

    Support Period
    Philips will provide the necessary security updates until 31 December 2026.
  • Connectivity

    Bluetooth® wireless technology
    Connected brushing app
  • Power

    Voltage
    110-220 V
  • Technical specifications

    Battery
    Rechargeable
    Operating time (full to empty)
    14 days***
    Battery type
    Lithium ION
  • Design and finishing

    Colour
    Black
  • Service

    Warranty
    2-year limited warranty
  • Compatibility

    Android compatibility
    • Android phones
    • Bluetooth 4.0-enabled tablets
    iOS compatibility
    • iPad 3rd Gen or higher
    • iPhone 4S or higher
    • with iOS7 or higher
    • with iOS 7 operating system
  • Ease of use

    Handle
    Slim ergonomic design
    Handle compatibility
    Easy click-on brush heads
    Replacement reminder
    • To always ensure best results
    • reminder icon lights up
  • Items included

    Handle
    1 DiamondClean 9000
    Brush heads
    1 C3 Premium Plaque Control
    Travel case
    USB charging travel case
    Charger base
    1
  • Cleaning performance

    Performance
    Removes up to 10 x more plaque*
    Timer
    BrushPacer and SmarTimer
    Whitening benefits
    Whitens teeth in 1 day*
    Pressure feedback
    Vibrates handle to alert user
  • Modes

    Clean
    For exceptional everyday cleaning
    3 intensities
    • High
    • Low
    • Medium
    Deep Clean+
    For an invigorating deep clean
    Gum Health
    Special attention to molars
    White+
    To remove surface stains
  • Smart sensor technology

    BrushSync Replacement Reminder
    • Always know when to
    • replace brush heads
    Pressure sensor
    Alerts when brushing too hard
    BrushSync Technology
    • smart brush head
    • Connects smart handle and
  • Software Support

    Software updates
    Philips offers relevant software updates for a period of 2 years after the date of purchase.

What's in the box?

Other items in the box

  • Sonicare handle DiamondClean 9000
  • Premium Plaque Defense Brush Head (C3)
  • Puck
  • USB Charging Travel Case

Looking for additional accessories? Show Parts & Accessories

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  • * compared to DiamondClean
  • more than a manual toothbrush
  • ** based on two, two-minute periods of brushing per day
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