---
product_id: 373536247
title: "Philips Sonicare DiamondClean Smart 9400 Electric Toothbrush, Sonic Toothbrush with App, Pressure Sensor, Brush Head Detection, 4 Brushing Modes and 3 Intensity Levels, Black, Model HX9917/89"
brand: "philips"
price: "¥85409"
currency: JPY
in_stock: true
reviews_count: 8
category: "Philips"
url: https://www.desertcart.jp/products/373536247-philips-sonicare-diamondclean-smart-9400-electric-toothbrush-sonic-toothbrush-app
store_origin: JP
region: Japan
---

# 62,000 bristle movements/min App-enabled personalized coaching 2-week battery life per charge Philips Sonicare DiamondClean Smart 9400 Electric Toothbrush, Sonic Toothbrush with App, Pressure Sensor, Brush Head Detection, 4 Brushing Modes and 3 Intensity Levels, Black, Model HX9917/89

**Brand:** philips
**Price:** ¥85409
**Availability:** ✅ In Stock

## Summary

> 🦷 Elevate your smile game with smart sonic precision!

## Quick Answers

- **What is this?** Philips Sonicare DiamondClean Smart 9400 Electric Toothbrush, Sonic Toothbrush with App, Pressure Sensor, Brush Head Detection, 4 Brushing Modes and 3 Intensity Levels, Black, Model HX9917/89 by philips
- **How much does it cost?** ¥85409 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/373536247-philips-sonicare-diamondclean-smart-9400-electric-toothbrush-sonic-toothbrush-app)

## Best For

- philips enthusiasts

## Why This Product

- Trusted philips brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Connected Oral Care:** Sync with the Philips Sonicare app for personalized feedback and brushing insights that elevate your routine.
- • **Travel-Ready Luxury:** Charge anywhere with the sleek USB travel case and iconic charging glass—oral care that moves with your lifestyle.
- • **Precision Sonic Power:** Experience 20x more plaque removal with 62,000 vibrations per minute for a dentist-level clean every day.
- • **Smart Pressure Sensor:** Protect your gums with real-time alerts that stop you from brushing too hard—because gentle is powerful.
- • **Tailored Brushing Modes:** Choose from 4 modes and 3 intensity levels to customize your oral care routine like a pro.

## Overview

The Philips Sonicare DiamondClean Smart 9400 is a premium electric toothbrush delivering up to 20x more plaque removal and 15x healthier gums versus manual brushing. Featuring 62,000 sonic vibrations per minute, 4 customizable brushing modes, 3 intensity levels, and a smart pressure sensor, it offers personalized oral care enhanced by a dedicated app. With a 2-week battery life, USB travel charging case, and premium brush heads included, it’s designed for professionals who demand effective, tech-forward dental hygiene on the go.

## Description

Product Description The Philips Sonicare DiamondClean Smart 9400 electric toothbrush provides complete and efficient oral care, removing up to 20 x more plaque than a manual toothbrush and providing up to 15 x healthier gums². It's safe to use with braces, fillings, crowns and veneers. There are 4 brushing modes: Clean mode for daily cleaning, White+ for stain removal, Gum Health for gentle but effective cleaning of the gums and Deep Clean+ for a refreshing, thorough clean. There are also 3 intensity levels to choose from. The built-in Philips Sonicare light ring pressure sensor lets you know if you're pressing too hard. The Advanced Sonic Technology provides gentle yet effective cleaning, pulsing fluid between teeth and along the gumline with a cleaning power of 62,000 bristle movements per minute. The innovative BrushSync™ technology will let you know when it's time to change your brush head. Improve your brushing technique with QuadPacer and reach your recommended brushing time of 2 minutes with SmarTimer. The Philips Sonicare DiamondClean Smart 9400 works perfectly as a travel toothbrush thanks to the premium travel case with an integrated USB. You can also top up the power at home with the iconic charging glass. With regular use, the battery will last up to two weeks on a single charge (based on two periods of two-minute brushings per day on standard mode). ¹ vs. a manual toothbrush ² in Clean mode vs. a manual toothbrush ³ based on a study of over 2600 dental professionals (dentists and hygienists) conducted in the United States, Canada, Japan, China, Korea, Thailand, Germany, the United Kingdom, Switzerland, France, Belgium, Austria, Italy, Spain, Sweden in 2022-2023 ⁴ after 3 days of use in White+ Mode vs a manual toothbrush using a leading whitening toothpaste.Packaging may vary. Directions 1. Use one of the four high-performance brush heads to focus on all areas of your oral health. 2. Follow the Smart Sensor technology for personalized feedback and coaching. 3. Ensure 100% coverage with the TouchUp feature. 4. Brush for the recommended duration using the BrushPacer and SmarTimer. 5. Replace the brush head every 3 months as indicated by the reminder icon. Safety Warning Keep out of reach of children under 3 years old. Use only for oral hygiene. Legal Disclaimer Philips offers relevant software updates for a period of 2 years after the date of purchase

Review: very powerful, reasonably quiet - i was hesitant to go for this brush after years of using oral B and the first few brushes did feel odd, but now I'm past that this is an excellent choice, i needed a good electric brush that was not only transportable in a case but also rechargeable via USB power bank and this fitted the bill perfectly, it feels well made and isn't too noisy, there is a built in 2 min timer function, it has several cleaning functions and 3 levels of intensity, the vibrations are very strong and it cleans your teeth well, i like the supplied glass that means this won't topple over in the bathroom like others do, and the glass is also used alongside the charging puck, you also get 1 years' worth of brush heads supplied so no other immediate outlay. the APP is there if you're that way inclined and it keeps track of your progress, but it has to be open and with you which i did a few times but not since as it's a bit gimmicky in my opinion, all in all as a good powerful toothbrush that has multiple modes and power levels it is very much recommended
Review: Electric tooth brush. - I like it, works well.

## Features

- Advanced sonic toothbrush for improved oral health: with the same brushing, it's up to 20 x more effective¹ and provides up to 15 x healthier gums²
- Personalise your brushing with this innovative electric toothbrush for adults: choose from 4 brushing modes and 3 intensity levels to meet your oral healthcare goals
- Real-time feedback: the light ring on the end of your handle will flash if you use too much pressure, so you can ease off the pressure and protect your teeth and gums
- Personalised guidance: connect your toothbrush to the Philips Sonicare app and receive personalised brushing guidance to maintain and improve your brushing habits
- #1 dental professional-recommended sonic toothbrush brand worldwide³: benefit from Philips expertise to keep your teeth and gums in the best condition
- The set includes: 1 x DiamondClean Smart 9400 sonic electric toothbrush, 1 x A3 Premium All-in-One brush head, 1 x G3 Premium Gum Care brush head, 1 x charging glass, 1 x USB charging travel case
- Contains UK 2-Pin bathroom plug for use in bathrooms. Packaging may vary.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09BW5SJBD |
| Age Range Description | Adult |
| Age range (description) | Adult |
| Best Sellers Rank | 7,400 in Health & Personal Care ( See Top 100 in Health & Personal Care ) 32 in Sonic Toothbrushes |
| Brand | Philips |
| Brand Name | Philips |
| Bristle Material | Nylon |
| Colour | Black |
| Country Of Origin | China |
| Customer Reviews | 4.3 out of 5 stars 327 Reviews |
| Handle Material | Plastic |
| Included Components | Charger |
| Item Firmness Description | Medium |
| Item Weight | 0.84 Kilograms |
| Item firmness description | Medium |
| Manufacturer | Philips |
| Manufacturer Warranty Description | 2 year manufacturer |
| Material Features | Sustainable |
| Model Name | Philips Sonicare DiamondClean 9400 Sonic Electric Toothbrush with app HX9917/89, Black |
| Mount Motion | Pulsate |
| Number of Items | 1 |
| Number of Pieces | 7 |
| Number of settings | 4 |
| Operation Mode | Automatic |
| Other Special Features of the Product | Brushing Timer |
| Package Type Name | Box |
| Power Source | Battery Powered |
| Power source | Battery Powered |
| Reusability | Reusable |
| Special feature | Brushing Timer |
| Target Audience | Unisex-Adults |
| Toothbrush Head Shape | Diamond Shaped |
| Unit Count | 1.0 count |

## Product Details

- **Brand:** PHILIPS
- **Age range (description):** Adult
- **Special feature:** Brushing Timer
- **Power source:** Battery Powered
- **Item firmness description:** Medium
- **Colour:** Black
- **Material feature:** Sustainable
- **Number of items:** 1
- **Toothbrush Head Shape:** Diamond Shaped
- **Unit count:** 1.0 Count

## Images

![Philips Sonicare DiamondClean Smart 9400 Electric Toothbrush, Sonic Toothbrush with App, Pressure Sensor, Brush Head Detection, 4 Brushing Modes and 3 Intensity Levels, Black, Model HX9917/89 - Image 1](https://m.media-amazon.com/images/I/712ihOzpJbL.jpg)
![Philips Sonicare DiamondClean Smart 9400 Electric Toothbrush, Sonic Toothbrush with App, Pressure Sensor, Brush Head Detection, 4 Brushing Modes and 3 Intensity Levels, Black, Model HX9917/89 - Image 2](https://m.media-amazon.com/images/I/7195ZNcGOsL.jpg)
![Philips Sonicare DiamondClean Smart 9400 Electric Toothbrush, Sonic Toothbrush with App, Pressure Sensor, Brush Head Detection, 4 Brushing Modes and 3 Intensity Levels, Black, Model HX9917/89 - Image 3](https://m.media-amazon.com/images/I/71BLtBTbxLL.jpg)
![Philips Sonicare DiamondClean Smart 9400 Electric Toothbrush, Sonic Toothbrush with App, Pressure Sensor, Brush Head Detection, 4 Brushing Modes and 3 Intensity Levels, Black, Model HX9917/89 - Image 4](https://m.media-amazon.com/images/I/71EyXwXfsVL.jpg)
![Philips Sonicare DiamondClean Smart 9400 Electric Toothbrush, Sonic Toothbrush with App, Pressure Sensor, Brush Head Detection, 4 Brushing Modes and 3 Intensity Levels, Black, Model HX9917/89 - Image 5](https://m.media-amazon.com/images/I/71Il9OCHknL.jpg)

## Available Options

This product comes in different **Style** options.

## Questions & Answers

**Q: Is there an instant Feedback with this model where there is a sensor to locate the location of the brush in the mouth?**
A: Yes

**Q: Does it have a sensitive setting?**
A: Yes

**Q: Does it come with a warranty?**
A: How LONG is the warranty-is it 12 months or less? Please state clearly ?

**Q: Can two people, each with downloaded Sonicare app of their own, connect to the same 9400 brush**
A: Yes

## Customer Reviews

### ⭐⭐⭐⭐⭐ very powerful, reasonably quiet
*by A***Y on 19 July 2025*

i was hesitant to go for this brush after years of using oral B and the first few brushes did feel odd, but now I'm past that this is an excellent choice, i needed a good electric brush that was not only transportable in a case but also rechargeable via USB power bank and this fitted the bill perfectly, it feels well made and isn't too noisy, there is a built in 2 min timer function, it has several cleaning functions and 3 levels of intensity, the vibrations are very strong and it cleans your teeth well, i like the supplied glass that means this won't topple over in the bathroom like others do, and the glass is also used alongside the charging puck, you also get 1 years' worth of brush heads supplied so no other immediate outlay. the APP is there if you're that way inclined and it keeps track of your progress, but it has to be open and with you which i did a few times but not since as it's a bit gimmicky in my opinion, all in all as a good powerful toothbrush that has multiple modes and power levels it is very much recommended

### ⭐⭐⭐⭐⭐ Electric tooth brush.
*by T***N on 22 January 2026*

I like it, works well.

### ⭐⭐⭐⭐ Great Toothbrush
*by J***E on 12 December 2025*

I haven’t experienced any issues with the product itself so far; it has functioned as expected. However, the shipping box arrived noticeably damaged, with tears and dents visible, although this apparent damage did not seem to impact the integrity of the product. Since purchasing, I have only used it four times, so I cannot comment on its long-term durabilit.

## Frequently Bought Together

- Philips Sonicare DiamondClean Smart 9400 Electric Toothbrush, Sonic Toothbrush with App, Pressure Sensor, Brush Head Detection, 4 Brushing Modes and 3 Intensity Levels, Black, Model HX9917/89
- Philips Sonicare Original A3 Premium All-in-One Standard Sonic Toothbrush heads - 2 Pack in Black (Model HX9092/11)
- Philips Sonicare Original C3 Premium Plaque Defence Standard Sonic Toothbrush Heads - 4 Pack in Black (Model HX9044/33) (Packing May Vary)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-01-27*