




Sonic Flex Teeth Whitening Set · Sonic Toothbrush
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Content: 1 piece
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Note:
This model, emmi Sonic Flex, is a sonic toothbrush that cleans through mechanical movement and vibration. Are you looking for cleaning completely without mechanical movement — ideal for sensitive teeth or gums, implants, braces, or periodontitis? Then our patented emmi-dent ultrasonic toothbrushes are the ideal solution for you. We offer both technologies. Which one is right for you depends on your needs.
Why emmi Sonic Flex?
Key features at a glance
- Vibration frequency: 29,760–38,400 movements/minute
- 5 modes × 5 intensities = 25 settings
- UV Travel Case with UVC LED (285 nm, 10-minute automatic cycle)
- Bristles: PEDEX Magic-Twist + color-changing bristles
- Consistent performance regardless of battery level
- Battery life: up to 90 days
- Charging via inductive charging station or in the connected UV Travel Case

Why emmi Sonic Flex?
Key features at a glance
- Vibration frequency: 29,760–38,400 movements/minute
- 5 modes × 5 intensities = 25 settings
- UV Travel Case with UVC LED (285 nm, 10-minute automatic cycle)
- Bristles: PEDEX Magic-Twist + color-changing bristles
- Consistent performance regardless of battery level
- Battery life: up to 90 days
- Charging via inductive charging station or in the connected UV Travel Case


Premium Sonic Toothbrush with UV Sterilization and 25 Intensity Levels
The emmi Sonic Flex is the premium sonic toothbrush for anyone who doesn't want to leave their daily dental care to chance. With up to 38,400 mechanical movements per minute, 5 intelligent cleaning modes, and 25 finely tuned intensity levels, it adapts perfectly to your personal needs. It offers a UV sterilization travel case
and a battery life of up to 90 days - designed for people who value hygiene and control. It doesn't just scrub away. It cleans exactly the way that suits you.

Premium Sonic Toothbrush with UV Sterilization and 25 Intensity Levels
The emmi Sonic Flex is the premium sonic toothbrush for anyone who doesn't want to leave their daily dental care to chance. With up to 38,400 mechanical movements per minute, 5 intelligent cleaning modes, and 25 finely tuned intensity levels, it adapts perfectly to your personal needs. It offers a UV sterilization travel case
and a battery life of up to 90 days - designed for people who value hygiene and control. It doesn't just scrub away. It cleans exactly the way that suits you.
25 Intensity Levels & 5 Modes
Finally Find Your Perfect Setting
Most sonic toothbrushes give you three modes. Maybe five. But the jumps between levels are so large that you either brush too gently or your gums suffer. The Sonic Flex offers maximum adaptability: it combines 5 cleaning modes, each with 5 intensities. This results in 25 levels you can choose from.
Clean — for daily, thorough cleaning
Massage — gently stimulates gums
White — removes surface stains
Gum Care — especially gentle for sensitive gums
Sensitive — ideal for sensitive teeth

25 Intensity Levels & 5 Modes
Finally Find Your Perfect Setting
Most sonic toothbrushes give you three modes. Maybe five. But the jumps between levels are so large that you either brush too gently or your gums suffer. The Sonic Flex offers maximum adaptability: it combines 5 cleaning modes, each with 5 intensities. This results in 25 levels you can choose from.
Clean — for daily, thorough cleaning
Massage — gently stimulates gums
White — removes surface stains
Gum Care — especially gentle for sensitive gums
Sensitive — ideal for sensitive teeth


Constant Power
Even with low battery
As battery voltage decreases, cleaning performance usually also decreases. With many models in the mid-price segment, you lose up to 30 percent oscillation angle when the battery drops below 50 percent. The emmi Sonic Flex works with a constant voltage motor that delivers consistently strong performance – regardless of the battery's charge level.
In contrast to many conventional sonic toothbrushes, the cleaning motion remains stable and effective, even when the battery voltage drops.
The result: reliable cleaning performance with every use. No matter whether the battery is at 100 or 10 percent.

Constant Power
Even with low battery
As battery voltage decreases, cleaning performance usually also decreases. With many models in the mid-price segment, you lose up to 30 percent oscillation angle when the battery drops below 50 percent. The emmi Sonic Flex works with a constant voltage motor that delivers consistently strong performance – regardless of the battery's charge level.
In contrast to many conventional sonic toothbrushes, the cleaning motion remains stable and effective, even when the battery voltage drops.
The result: reliable cleaning performance with every use. No matter whether the battery is at 100 or 10 percent.
UV Sterilization in the Travel Case
No More Bacteria on the Brush
Anyone who travels a lot knows the problem: After brushing, the wet brush is placed in a fabric cover or plastic cap, where bacteria can multiply several times over within just a few hours.
The Sonic Flex's included UV Travel Case solves this problem. A UVC LED eliminates up to 99.9 percent of bacteria on the brush head.
Ideal for travel, business trips, or everyday hygiene:
- Charge the toothbrush in the travel case
- UVC LED sterilization
- Eliminates 99.9% of bacteria on the brush head
- Automatic safety shut-off when the lid is open.
- Automatic shut-off after 10 minutes when the lid is closed.
This keeps your toothbrush hygienically clean and ready to use at all times, even on the go.

UV Sterilization in the Travel Case
No More Bacteria on the Brush
Anyone who travels a lot knows the problem: After brushing, the wet brush is placed in a fabric cover or plastic cap, where bacteria can multiply several times over within just a few hours.
The Sonic Flex's included UV Travel Case solves this problem. A UVC LED eliminates up to 99.9 percent of bacteria on the brush head.
Ideal for travel, business trips, or everyday hygiene:
- Charge the toothbrush in the travel case
- UVC LED sterilization
- Eliminates 99.9% of bacteria on the brush head
- Automatic safety shut-off when the lid is open.
- Automatic shut-off after 10 minutes when the lid is closed.
This keeps your toothbrush hygienically clean and ready to use at all times, even on the go.


Up to 90 days battery life
No more searching for a charger when traveling
The emmi Sonic Flex's battery lasts up to 90 days when brushing twice a day. A long vacation trip? No problem. The Sonic Flex will last. Those who only have to think about the charging cable once a quarter will appreciate maximum freedom and comfort.

Up to 90 days battery life
No more searching for a charger when traveling
The emmi Sonic Flex's battery lasts up to 90 days when brushing twice a day. A long vacation trip? No problem. The Sonic Flex will last. Those who only have to think about the charging cable once a quarter will appreciate maximum freedom and comfort.
PEDEX High-Performance Bristles
152% more cleaning power
The brush heads of the emmi Sonic Flex are equipped with PEDEX Magic-Twist bristles from Germany.
In a laboratory study conducted in cooperation with the University of Witten/Herdecke, these achieved a cleaning performance of up to 152% compared to conventional nylon bristles, which are often used in competitor models.

PEDEX High-Performance Bristles
152% more cleaning power
The brush heads of the emmi Sonic Flex are equipped with PEDEX Magic-Twist bristles from Germany.
In a laboratory study conducted in cooperation with the University of Witten/Herdecke, these achieved a cleaning performance of up to 152% compared to conventional nylon bristles, which are often used in competitor models.


Smart Color-Change Bristles
Integrated color-change bristles ensure continuously optimal results: After about three months, the color visibly fades, reliably indicating when a brush head change is necessary – completely automatically, without an app, without a sensor, and without additional reminders.
This way, effective cleaning and maximum hygiene are combined in one well-thought-out system.

Smart Color-Change Bristles
Integrated color-change bristles ensure continuously optimal results: After about three months, the color visibly fades, reliably indicating when a brush head change is necessary – completely automatically, without an app, without a sensor, and without additional reminders.
This way, effective cleaning and maximum hygiene are combined in one well-thought-out system.
Who is the emmi Sonic Flex the right choice for?
The Sonic Flex is made for people who have classic premium demands: thorough cleaning, German bristles, UV hygiene, long battery life, no app, no gimmicks. It is the right choice if you have sensitive gums and are finally looking for a brush that adapts to you instead of the other way around. It is the right choice if you travel a lot and don't want to look for an outlet in the hotel bathroom. And it is the right choice if you are looking for a brand that has been at home in oral hygiene for over 25 years — with a service team in Germany that answers in German when you have a question.
For a radiant smile – even on the go
The Sonic Flex provides a thorough daily sonic cleaning. The set is complemented by the whitening toothpaste without titanium dioxide and the refreshing Ice Fresh mouthwash. Everything is compactly stored in the practical travel bag – ideal for home and travel.

For a radiant smile – even on the go
The Sonic Flex provides a thorough daily sonic cleaning. The set is complemented by the whitening toothpaste without titanium dioxide and the refreshing Ice Fresh mouthwash. Everything is compactly stored in the practical travel bag – ideal for home and travel.

The set at a glance
For more information, simply click on the respective product.
FAQ
Your most frequent questions at a glance
How long does the battery of the emmi Sonic Flex last?
How long does the battery of the emmi Sonic Flex last?
When used twice daily for two minutes each time, the 2200 mAh lithium battery lasts up to 90 days. The actual runtime depends on the selected intensity level — at the highest level, the runtime is reduced to about 60 days. Thanks to the constant voltage motor, the cleaning performance remains consistently strong until the next charge.
How does UV sterilization work in the travel case?
How does UV sterilization work in the travel case?
The included travel case contains a UVC LED with a wavelength of 285 nanometers. As soon as you close the lid, the UV light automatically activates for ten minutes and eliminates up to 99.9 percent of bacteria on the brush head. If you open the lid, the light immediately switches off – thus preventing skin contact with UV radiation.
Can I charge the emmi Sonic Flex wirelessly?
Can I charge the emmi Sonic Flex wirelessly?
Yes. The Sonic Flex supports two charging methods: wireless charging via the inductive charging station or in the included travel case while it is plugged in. A full charge takes approximately 8 hours.
How often do I need to change the brush head?
How often do I need to change the brush head?
Sonic Flex brush heads feature color-changing bristles that fade after approximately three months, signaling that a replacement is needed. With daily use, we recommend changing them every three months—regardless of how good the bristles still look.
How does the emmi-dent ultrasonic toothbrush work?
How does the emmi-dent ultrasonic toothbrush work?
Compared to electric sonic toothbrushes, emmi-dent ultrasonic toothbrushes clean without mechanical movements. The patented piezo-ceramic disc (ultrasound transducer) is located in the brush head of the emmi-dent ultrasonic toothbrush. In the smart brush head, electrical energy is converted into ultrasonic waves, which are transferred to the teeth and gums via the bristles, with the help of special ultrasonic toothpastes and saliva. The ultrasound transducer is made to vibrate (up to 96 million multi-frequency oscillations). These ultrasonic waves destroy the structure of the micro-bubbles enriched in the toothpaste, they collapse and create a suction effect. This suction effect removes biofilm and plaque. The standard process of brushing teeth.
The ultrasound is neither audible nor noticeable. Nevertheless, in conjunction with a special ultrasonic toothpaste, it generates millions of tiny micro-bubbles. Thanks to their small size, these penetrate even the smallest interdental spaces, where they collapse and create a suction effect. This dissolves impurities such as biofilm and plaque. The vibrations of the ultrasonic toothbrush transport the dissolved dirt from the interdental spaces. You then simply rinse it out. The result is healthy, sustainably cleaned and smooth teeth.
Who is the emmi-dent ultrasonic toothbrush suitable for?
Who is the emmi-dent ultrasonic toothbrush suitable for?
Our emmi-dent ultrasonic toothbrushes are generally suitable for all people who want to gently clean their teeth and, above all, eliminate the risk of "scrubbing away" tooth enamel. Particularly suitable for people with sensitive gums, gingivitis and periodontitis, brace wearers, implant and bridge wearers, we offer ultrasonic toothbrushes for every age. Our range includes various brush heads, including an attachment for children and people with small mouths. This makes dental care playfully easy for the youngest.
Older people and individuals with motor challenges also benefit from the simple operation of the ultrasonic toothbrush. The emmi-dent Platinum Care is recommended here. Awarded the EURECERT certificate! The world's first barrier-free certified toothbrush.
The ultrasonic toothbrush also helps with bad breath by reducing bacteria to a healthy level.
We have developed a special brush head for brace wearers. The ultrasonic vibrations thoroughly clean even the inaccessible areas between teeth and braces. People with dental implants also benefit from the maximum cleaning performance of the innovative ultrasonic technology.
What distinguishes ultrasonic toothbrushes from regular electric toothbrushes?
What distinguishes ultrasonic toothbrushes from regular electric toothbrushes?
Electric toothbrushes include both oscillating-rotating toothbrushes, sonic toothbrushes, and ultrasonic toothbrushes. While the former usually have round brushes that rotate alternately from left to right, sonic toothbrushes are equipped with elongated, vibrating heads. With 20,000 to 40,000 oscillations per minute, they achieve significantly higher mechanical movements than oscillating-rotating brushes. Ultrasonic toothbrushes far exceed this performance and are
also a completely different technology. While oscillating-rotating and sonic toothbrushes remove biofilm with the help of mechanical movements, the emmi-dent works with up to 96 million ultrasonic oscillations per minute and requires no mechanical movements for tooth cleaning. Motionless tooth cleaning thanks to state-of-the-art ultrasonic technology.
Thus, the decisive difference lies in the type of tooth cleaning: Just like
manual toothbrushes, oscillating-rotating and sonic toothbrushes also clean teeth mechanically. This so-called macro cleaning carries a risk of injuries to gums and tooth enamel if the toothbrush is used improperly. Additionally, ultrasound is able to minimize inflammation. This is confirmed by our study.
Dental care is limited to the areas in the mouth that the oscillating-rotating or sonic toothbrush reaches. In contrast to conventional electric toothbrushes, the ultrasonic toothbrush works completely without pressure by transmitting vibrations. This ensures comprehensive cleaning of the entire oral cavity.
























