Introduction
This manual provides essential information for the safe and effective use of your Philips Sonicare DiamondClean Electric Toothbrush. Please read these instructions carefully before first use and retain them for future reference.
Setup
1. Charging the Toothbrush
Before initial use, fully charge your Philips Sonicare DiamondClean toothbrush. The toothbrush utilizes a wireless charging base for convenience.
- Connect the charging base to a power outlet.
- Place the toothbrush handle onto the charging base.
- The battery indicator light on the handle will illuminate to show charging status. A full charge typically takes approximately 24 hours and provides up to 14 days of regular use.

Image: Philips Sonicare DiamondClean toothbrush handle placed on its wireless charging base for charging.
2. Attaching the Brush Head
Align the brush head with the metal shaft on the toothbrush handle and push it down firmly until it clicks into place.

Image: A hand demonstrating how to attach a click-on brush head to the Philips Sonicare toothbrush handle.
Operating Instructions
1. Powering On/Off and Mode Selection
The toothbrush features a power button and mode selection buttons for a customized brushing experience.
- Press the Power Button to turn the toothbrush on or off.
- Use the Mode Selection Buttons (up/down) to choose between available cleaning modes: Clean and White.
- Adjust the brushing intensity using the dedicated intensity buttons.

Image: Close-up of the Philips Sonicare DiamondClean Electric Toothbrush handle, highlighting the power button and mode selection controls.
2. Brushing Technique
For optimal cleaning and gum health, follow these recommended brushing techniques:
- Wet the bristles and apply a small amount of toothpaste.
- Place the brush head against your teeth at a 45-degree angle, aiming the bristles towards the gumline.
- Gently move the brush head slowly across each tooth, allowing the sonic vibrations to clean the surfaces. Do not scrub.
- The built-in Brushing Timer will signal after 30 seconds to indicate when to move to the next quadrant of your mouth, ensuring a full 2-minute brushing cycle.
- The Pressure Sensor will alert you if you are brushing too hard, helping to protect your gums and teeth.

Image: A visual guide demonstrating the correct 45-degree angle for placing the brush head against teeth and gums.
Maintenance
1. Cleaning the Toothbrush
- After each use, rinse the brush head thoroughly under running water.
- Wipe the handle with a damp cloth. Do not immerse the handle in water.
2. Replacing Brush Heads
For optimal performance and hygiene, replace your brush head every 3 months, or sooner if the bristles become frayed or worn.

Image: The Philips Sonicare DiamondClean toothbrush with a new DiamondClean brush head, emphasizing the importance of regular replacement.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Toothbrush does not turn on. | Low battery or not charged. | Place the toothbrush on the charger for at least 24 hours. |
| Toothbrush stops during use. | Excessive pressure applied. | Reduce pressure. The pressure sensor is designed to prevent over-brushing. |
| Reduced brushing effectiveness. | Worn brush head. | Replace the brush head (recommended every 3 months). |
Specifications
- Model Name: DiamondClean
- Item Model Number: Philips121
- Power Source: Battery Powered
- Battery Life: Up to 14 days (based on 2 minutes of brushing, twice a day)
- Operation Mode: Automatic, Vibrate
- Number of Settings: 2 (Clean, White)
- Included Components: Toothbrush Handle, Brush Head, Wireless Charging Base, Travel Case
- Special Features: Brushing Timer, Pressure Sensor
- Bristle Material: Nylon
- Handle Material: Plastic
- Color: White
- Package Dimensions: 8.54 x 5.55 x 2.52 inches
- Item Weight: 11.99 ounces
Safety Information
Do not use this product for purposes other than oral hygiene. Replace brush head every 3 months for optimal performance and hygiene. Statements regarding dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease or health condition.
Warranty and Support
For warranty information, product registration, or technical support, please refer to the documentation included in your product packaging or visit the official Philips Sonicare website. Keep your purchase receipt as proof of purchase for warranty claims.





