£399.99

Philips Sonicare DiamondClean Smart 9400 Electric Toothbrush, Sonic Toothbrush with App, Pressure Sensor, Brush Head Detection, 4 Cleaning Modes and 3 Intensity Levels, Black, Model HX9917/89

Black, HX9917/89

Price data last checked 83 day(s) ago - refreshing...

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Price History & Forecast

Last 5 days • 5 data points (No recent data available)

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£399.99 £179.99 £227.99 £275.99 £323.99 £371.99 £419.99 27 January 2026 28 January 2026 29 January 2026 30 January 2026 31 January 2026

Price Distribution

Price distribution over 5 days • 2 price levels

Days at Price
Current Price
4 days 1 day · current 0 1 2 3 4 £200 £400 Days at Price

Price Analysis

Most common price: £200 (4 days, 80.0%)

Price range: £200 - £400

Price levels: 2 different prices over 5 days

Description

Product Description The Philips Sonicare DiamondClean Smart 9400 electric toothbrush provides complete and efficient oral care, removes up to 20 times more plaque than a manual toothbrush and provides up to 15 times healthier gums². Safe to use with braces, fillings, crowns and veneers. There are 4 cleaning modes: Clean mode for daily cleaning, White+ mode for removing discolouration, Gum Health mode for gentle but effective cleaning of the gums and Deep Clean+ mode for a refreshing, thorough clean. There are 3 intensity levels available. Plus, the integrated Philips Sonicare ProtectiveClean pressure sensor with light ring shows you when you press too hard. Advanced sonic technology provides gentle yet effective cleaning by flushing liquid into the interdental spaces and along the gum line and providing a cleaning performance of 62,000 bristle movements per minute. The innovative BrushSync™ technology informs you when it's time to change the brush head. Improve your brushing technique with the 4-quadrant timer. In addition, you can reach the recommended cleaning time of 2 minutes with the 2-minute timer. The Philips Sonicare DiamondClean Smart 9400 is perfect as a toothbrush on the go, thanks to the high-quality travel case with integrated USB. You can also charge the battery at home with the iconic charging glass. With regular use, the battery lasts up to two weeks on a single charge (based on two cleaning cycles of two minutes per day in standard mode). ¹ compared to a manual toothbrush ² in clean mode compared to a manual toothbrush ³ based on one between 2022 and 2023 of over 2,600 dentists (dentists and dental hygienists) in the USA, Canada, Japan, China, Korea, Thailand, Germany, UK, Switzerland, France, Belgium, Austria, Italy. Spain, Spain, Spain Study carried out after 3 days in White+ mode with a leading toothpaste for teeth whitening compared to a manual toothbrush Directions [GEN] Use electric toothbrush: attach the brush head, apply toothpaste, gently move the brush up and down to the teeth, regular charging. Safety Warning Do not use for purposes other than oral hygiene. Avoid applying excessive pressure while brushing. Replace brush head every 3 months. Keep out of reach of children under 3 years old. Software support is available for 2 years after purchase, ensure to update the software as recommended.

Key Features

Advanced sonic toothbrush for improved oral health: with the same brushing behaviour, it is up to 20 times more effective¹ and ensures up to 15 times healthier gums²

Personalize your toothbrushing experience with this innovative adult electric toothbrush: choose from 4 brushing modes and 3 intensity levels to achieve your oral hygiene goals

REAL TIME REAL TIME RESULTING The light ring at the end of the handpiece will flash when you apply too much pressure. So you can reduce pressure and protect your teeth and gums

Personalised instructions: connect your toothbrush to the Philips Sonicare app and receive personalised cleaning instructions to maintain and improve your brushing habits

The most recommended sonic toothbrush brand worldwide³: Benefit from Philips expertise to optimally care for teeth and gums

The set contains: 1 x DiamondClean Smart 9400 electric sonic 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 travel charging case

Product Specifications

Brand
Philips
Colour
Black
Size
1 Count (pack Of 1)
Format
Personal Care
Domain
Amazon UK
Listed Since
22 July 2021

Barcode

No barcode data available

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