Philips Sonicare DiamondClean Smart Electric Toothbrush with App (HX9903/41) - Cashmere Grey

Model Number: HX9903/41
Web Code: 10761883


Get the complete oral care you need with the Philips Sonicare DiamondClean Smart electric toothbrush. It features Smart Sensor technology that tracks your brushing in real time and sends that data to the Sonicare app. In-app coaching helps you improve your brushing, taking you back to missed spots, alerting you if you press too hard, and more.
Sold and shipped by Best Buy
Sold out online
Reserve & Pick Up

This product is currently unavailable for Reserve & Pick Up at nearby stores.

  • Connected electric toothbrush features built-in Smart Sensor technology that tracks your brushing in real time, sending the data to the Sonicare app via Bluetooth
  • Personalized in-app coaching helps improve your brushing by taking you back to any missed spots, alerting you if you press too hard, and guiding you to reduce scrubbing
  • Removes up to 10x more plaque and 100% more stains than a manual toothbrush
  • Designed to help improve your gum health with up to 7x healthier gums in 2 weeks
  • Offers 4 modes, Clean mode for daily cleaning, White+ to remove stains, Deep Clean+ for an invigorating deep clean, and Gum Health to gently clean along your gum line
  • 3 intensity settings allow you to boost your cleaning
  • Syncs automatically with the brush head and selects the optimal mode and intensity to provide effective care so you get the most from the brush head
  • Charging glass makes it a cinch to recharge and store your toothbrush; simply place the toothbrush into the glass holder after brushing and it will start charging immediately
  • Premium travel case included for taking the toothbrush on the go
Battery Level Indicator
Charge Time
1 h
Brushing Modes
Pressure Sensor
Indicator Bristles
In-Handle Display
Separated LCD Display
Number of Moving Heads
Replaceable Brush Heads
Brush Heads Container
Included Brush Heads
Cashmere Grey
Country of Origin
17.4 cm
25.2 cm
11.1 cm
1048 g
  • Handles: DiamondClean Smart
  • Brush Heads: Premium Plaque Control
  • Premium Gum Care Brush Head
  • Premium White Brush Head
  • Glass Charger
  • Travel Case: Premium Travel Case

  • Best toothbrush hands down!
    by BigBoyBrushTeeth

    on January 6, 2020

    I have been using Philips Sonicare for over 10 now and this is the best model I have ever used so far. I truly enjoy the technology Philips put into their products like this toothbrush. A couple of features I really enjoy are the reminder light when brushing too hard and the charging glass. The only con is perhaps the toothbrush handle which feels a bit slippery. I would highly recommend this toothbrush.

    Review originally posted on

  • Love it
    by Texas2227

    on December 30, 2019

    Great toothbrush love the app. Distance from app not good though

    Review originally posted on

  • one of the best
    by kpwrites

    on December 24, 2019

    Its a great product. Very thorough cleaning. Brush has customizable speed controls which is a plus. App is ok needs bit more improvement with connectivity.

    Review originally posted on

See helpful questions and answers from shoppers like you.

Check our return policy and you'll find specific return information for your product and steps on how to return in-store or by mail.