Other items in the box
- Sonicare handle DiamondClean 9000
- Premium Plaque Defense Brush Head (C3)
- Puck
- USB Charging Travel Case
HX9911/39
Whiter teeth in just 1 day*
Philips Sonicare's best whitening in our most elegant sonic electric toothbrush. Switch to Philips Sonicare.
See all benefitsKnow you're getting the deepest possible clean with the C3 Premium Plaque Control brush 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.
The C3 Premium Plaque Control brush 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*.
The DiamondClean 9000 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.
The DiamondClean 9000 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.
Smart brush 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 brush head. Your DiamondClean 9000's BrushSync technology will automatically sync your brush head with the White+ mode to help whiten your teeth.
You might not notice if you're brushing too hard, but your DiamondClean 9000 will. If you need to ease up, the toothbrush will make a pulsing sound. It's a reminder to let your brush head do the work. 7 out of 10 people found this feature helped them become a better brusher.
All brush 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 brush 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.
Your DiamondClean 9000 will last for up to two weeks on a single charge with regular use.
Connectivity
Power
Technical specifications
Design and finishing
Service
Compatibility
Ease of use
Items included
Cleaning performance
Modes
Smart sensor technology
Software Support
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