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Philips Sonicare DiamondClean 9900 Prestige Electric Toothbrush Charging Travel Case, Black, Model HX9992/43
£296.99
Philips’ Most Advanced AI Sonic Toothbrush | SenseIQ Sensing Technology Adjusts Intensity in Real-Time to Protect Gums, Removes Up to 20x More Plaque, Includes Leatherette USB Charging Case & All-in-One Brush Head (Black)
25 in stock
Shipping Policy
Free standard shipping, everywhere in the UK
We keep shipping simple: every order ships free, with no minimum spend required, anywhere in the United Kingdom.
Delivery timeline
- Processing time: 1–2 business days to prepare your order before it ships.
- Delivery time: 1–7 business days once dispatched.
- Business days are Monday to Friday, excluding UK bank holidays.
How you’ll know where your order is
Once your order ships, we’ll email you tracking information so you can follow its progress right up to your door.
One shipping option, for everyone
We currently offer a single shipping method — free standard delivery — for all orders and all UK postcodes. There’s no express or next-day option at this time, so the 1–7 business day window applies across the board.
If your delivery is taking longer than expected
If it’s been more than 7 business days since dispatch and your order hasn’t arrived, contact us at support@sgislandcart.com or +44 1372 463099 with your order number, and we’ll look into it with the courier right away.
Return & Refund
You have 30 days from the date of delivery to return your order for a full refund — no reason needed. This is more generous than your minimum legal right to cancel under UK law, so by offering 30 days, we already cover that requirement in full.
What condition the item needs to be in
You’re welcome to open the packaging and check the item the way you would in a physical shop. If it comes back showing signs of use beyond this — for example, worn, installed, or damaged — we may deduct an amount from your refund to reflect the reduction in value. We’ll always explain clearly why, and how much, before finalising any deduction.
How to return an item
- Email support@sgislandcart.com within 30 days of delivery, with your order number and the reason for return.
- We’ll confirm the process and give you a returns address.
- Pack the item securely, ideally in its original packaging, and send it back.
- Once we receive and inspect it, we’ll refund you to your original payment method within 7 days.
If something arrives faulty, damaged, or incorrect
This isn’t limited to the 30-day window. Under the Consumer Rights Act 2015, you’re entitled to a repair, replacement, or refund for a faulty, damaged, or incorrect item, and we’ll cover the return cost in full — you won’t be out of pocket. Contact us within 30 days of delivery for the fastest resolution; your legal rights for faulty goods continue beyond this period too.
Items we cannot accept for return
For hygiene and safety reasons, items that have been opened, used, or are not in resaleable condition cannot be returned unless faulty. Items marked “Final Sale” at purchase are also excluded unless faulty.
Your rights are not limited by this policy
Nothing here reduces your statutory rights under UK consumer law. If anything in this policy conflicts with your legal rights, your legal rights take priority.
Questions about a return?
Email support@sgislandcart.com or call +44 1372 463099, with your order number for the fastest response.
About this item
- Advanced sonic toothbrush for improved oral health: same brushing, now 20x more effective¹, up to 15x healthier gums in 2 weeks², and remove up to 100% more stains¹ in less than 2 days
- SenseIQ technology: Automatically adapts to your brushing behavior by decreasing the intensity when you press too hard to protect your teeth and gums
- Real-time feedback: The light ring on the end of your handle will flash if you apply too much pressure, gently reminding you to reduce pressure, helping protect your teeth and gums
- Personalised guidance: connect your electric toothbrush to the Philips Sonicare app and receive personalised brushing guidance and coverage feedback to maintain and improve your brushing habits
- #1 dental professional recommended sonic toothbrush brand worldwide
- The set includes: 1x DiamondClean Prestige 9900 sonic electric toothbrush, 4x A3 Premium All-in-One brush heads, 1x charging travel case, 1x charging stand. Packaging may vary.
What’s in the box?
- Travel Case
- Electric Toothbrush
- 3 x A3 Premium Brush Heads
- Charging Base
| Brand | PHILIPS |
| Age range (description) | Adult |
| Special feature | 3 Brushing Intensities, 5 Brushing Modes, Connectivity Application, Plaque Removal Up to 20x Upper, Pressure Detection, Senseiq Technology, Usb Charging |
| Item firmness description | Medium |
| Colour | Black |
| Material feature | Electronic Components, Premium Plastic |
| Number of items | 1 |
| Toothbrush Head Shape | Oval |
| Unit count | 1.0 count |
| Included components | 3 x A3 Premium Brush Heads, Charging Base, Electric Toothbrush, Travel Case |























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