£233.46

Philips Sonicare Smart 9400 Toothbrush - 4 Modes, Pressure Sensor, App

White, HX9917/88

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£233 today · previous high £233 · all-time low £198

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Price History & Forecast

Grey patches = out of stock. Cheaper = lower on the chart. Hover for exact prices.

Last 53 days • 53 data points (No recent data available)

Historical
Generating forecast...
£233.46 £194.44 £202.96 £211.47 £219.98 £228.49 £237.01 14 March 2026 27 March 2026 09 April 2026 22 April 2026 05 May 2026

Price Distribution

Price distribution over 53 days • 3 price levels

Days at Price
Current Price
14 days 34 days 5 days · current 0 9 17 26 34 £198 £200 £233 Days at Price

Price Analysis

Most common price: £200 (34 days, 64.2%)

Price range: £198 - £233

Price levels: 3 different prices over 53 days

Description

Experience professional-grade oral care at home with the Philips Sonicare DiamondClean Smart 9400 electric toothbrush. Powered by advanced sonic technology, it removes up to 20 x more plaque than a manual brush and promotes up to 15 x healthier gums. Four dedicated brushing modes-Clean, White+, Gum Health, and Deep Clean+-let you target daily cleaning, stain removal, gentle gum care, and an extra-thorough refresh. Choose from three intensity levels to match your comfort and dental needs. The built-in pressure-sensor light ring flashes when you brush too hard, protecting enamel and gums, while brush-head detection automatically adjusts settings for optimal performance. Seamlessly connect to the Philips Sonicare app for real-time feedback, personalized coaching, and progress tracking. Safe for use with braces, fillings, crowns and veneers, this smart toothbrush delivers a customized, clinically proven clean every day. Its sleek white design fits comfortably in hand, and the long-lasting battery provides weeks of use on a single charge. The intelligent brush head detection ensures you always get the right mode for each head, extending the life of your accessories. Join millions who trust Philips Sonicare for brighter smiles and stronger oral health.

Key Features

Removes up to 20 x more plaque than a manual brush, delivering clinically proven cleaner teeth and healthier gums.

Four brushing modes-Clean, White+, Gum Health, Deep Clean+-let you customize cleaning, stain removal, gum care, and deep refresh in one device.

Three intensity levels and a pressure-sensor light ring give real-time feedback to protect enamel and prevent over-brushing.

Brush-head detection automatically selects the optimal mode for each head, ensuring consistent performance and extending accessory life.

Connects to the Philips Sonicare app for personalized coaching, progress tracking, and tailored oral-care recommendations.

Product Specifications

Brand
Philips
Colour
White
Size
1 Count (pack Of 1)
Domain
Amazon UK
Release Date
29 October 2021
Listed Since
29 October 2021

Barcode

No barcode data available

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