
Sonic electric
toothbrush with app
DiamondClean
9000
Connected brushing made easy
Built-in pressure sensor
Smart brush head recognition
4 modes, 3 intensities
HX9911/78
Whiter, healthier teeth for life
Whiter teeth in just 1 day****
Philips Sonicare's best whitening in our most elegant sonic electric toothbrush.
Switch to Philips Sonicare.
DiamondClean users experience improved oral health
Deepest clean while protecting your sensitive gums
Up to 7x healthier gums* in just 2 weeks
Stay on track with a personalized progress report
Start and keep up healthy habits
Let the DiamondClean 9000 adapt to your needs
Personalized brushing experience
Lets you know if you're pressing too hard
BrushSync automatically selects the best mode for you
Always know when to replace your brush heads
Enjoy a stylish and user-friendly design
Simple to charge and style to boot

Sonic electric toothbrush with app
HX9911/78
Highlights
Up to 7x healthier gums*
Focus on improving your gum health with the
G3 Premium Gum Care brush head. Its smaller
size and targeted gum line bristles make it the
perfect way to keep this area gum disease free.
People who use this brush head have up to
100% less gum inflammation* and up to 7x
healthier gums in just two weeks.*
Premium Gum Care brush head
The G3 Premium Gum Care brush head is
designed to help you improve your gum health.
Its smaller size and targeted gumline bristles
gently and effectively clean the gum line,
where gum disease commonly starts out.
Progress Report
The Di amondClean 9000 gi ves you the
guidance you need to improve and maintain
healthy brushing habits in between dentist
checkups. 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 personalized Progress Report
helps you stay on track, to see how much
you've improved over time.
4 modes, 3 intensities
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.
BrushSync mode pairing
Smart brush heads ensure you're using the
right mode and intensity for the best possible
clean. For an example, 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.
Built-in pressure sensor
You might not noti ce 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 heads up to let your brush
head do the work. 7 out of 10 people found this
feature helped them become a better brusher.
BrushSync replacement reminder
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 gives you a heads up when it's time
to replace it.
Long-life battery
Your Di amondClean 9000 will last for up to
two weeks on a si ngle charge with regular use.

Sonic electric toothbrush with app
HX9911/78
Specifications
Modes
3 intensities: Low, High, Medium
Clean: For exceptional everyday clean
Deep Clean+: For an i nvigorating deep clean
Gum Health: Special attention to molars
White+: To remove surface stains
Items included
Handle: 1 Di amondClean 9000
Brush heads: 1 G3 Premium Gum Care
Glass charger: 1
Travel case: 1
Charger base: 1
Connectivity
Bluetooth® wireless technology: Connected
brushing app
Design and finishing
Color: Rose gold
Cleaning performance
Health benefits: Up to 7x healthier gums*
Whitening benefits: Whitens teeth in 1 day****
Pressure feedback: Vibrates handle to alert
user
Timer: BrushPacer and SmarTimer
Smart sensor technology
Pressure sensor: Alerts when brushing too
hard
BrushSync Replacement Reminder: Always
know when to, replace brush heads
BrushSync Technology: Connects smart handle
and, smart brush head
Ease of use
Handle compatibility: Easy cli ck-on brush
heads
Replacement reminder: To always ensure best
results, reminder icon lights up
Handle: Sli m ergonomic design
Technical specifications
Battery: Rechargeable
Battery type: Lithium ION
Operating time (full to empty): 14 days***
Power
Voltage: 110-220 V
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 operational
system, with iOS7 or higher
* * compared to DiamondClean
* more than a manual toothbr ush
* ** * in White+ Mode with lea ding whitening toothpaste
vs a manual toothbrus h
* ** based on tw o periods of two-minute brushing s per
day
© 20 21 Koninklijke Philips N.V.
All Right s reser ved.
Specifications are subject to change
without notice. Trademarks a re the
property of Koninklijke Philips N.V. or
their respective owners.
Issue date 202 1‑0 6‑09
Version: 1.0.1
EAN: 00 07502 00 993
27
www.phili ps.com