Sign up for exclusive offers
Electric toothbrushes
All series
Philips Sonicare DiamondClean Smart 9400 Sonic electric toothbrush with app
Support
HX9917/88
HX992W
Available in
Go to shop
Log in or create an account
You instantly have access to manuals, tailored support and more. Plus it’s quick and easy
Data Act Document
UK Declaration of conformity - English (US)
All (16)
How do I enable or disable the pressure sensor on my Sonicare?
Can I sync the Sonicare app with the Apple Health app?
Which brush head fits my Sonicare toothbrush?
In which countries is the Sonicare app available?
What do the battery status lights indicate on my Sonicare toothbrush?
Philips SonicareCharging station
Philips SonicareCharging glass
Philips SonicareCharging travel case
C3 Premium Plaque DefenceStandard sonic toothbrush heads
G3 Premium Gum CareStandard sonic toothbrush heads
I cannot connect my toothbrush to the Sonicare app
My Sonicare toothbrush is vibrating less powerfully
My Sonicare toothbrush is not vibrating
My Sonicare toothbrush turns off by itself
My Sonicare toothbrush is not charging
Check the terms of your warranty and start a product exchange or repair
Warranty
Our product warranty policies
Contacting Philips
We're happy to help you