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Frequently asked questions

A question about Slim Sonic?

You should find your answer here!

The brand

The name Slim Sonic comes from the compression of the words “Slim” and the patented Sonic Resonance® technology.

Unlike the products offering you miracles available on the internet and on teleshopping, it is you who makes the effort. Our products just help you to see results faster.

Slim Sonic, these are modules equipped with aluminum plates that allow to destock fat in a massive and targeted way.

While electrostimulation allows you to build muscle without moving, Slim Sonic allows you to burn fat while moving.

Our products are manufactured between France and Switzerland, in the Lake Geneva area, in order to privilege a better quality.

Our products are in no way dangerous, we use the same method as for ultrasound, but at a lower frequency to target fat cells.

The products

L-M-S indicate the size of the product and therefore the contact surface, which is important for representing the area to be treated.

660-840-880-1440 are the numbers that accompany the model letter. They simply correspond to the quantity of kcal removed in 40 minutes (Reminder: 1 kg of fat corresponds to 9,000 kcal).

Concerning Sonical, it is a module containing only one plate for a destocking of 400 kcal in 40 min.

Sonical is a Slim Sonic product containing only one plate. By owning several Sonicals (see our Sonical DUO and Sonical TRIO offers) you can treat several areas, as you wish.
To match the destocking of our M and L modules, you can start on our SONICAL DUO or TRIO packs.

We strive to provide you with the best quality product possible.
Our reconditioned products have been used, but are still quite usable for everyday use.

Our modules destock between 400 kcal for the Sonical and 1440 kcal for the L-1440.
You can of course combine the modules for a more massive destocking, on several parts of the body.

The results of our studies, which you can find on our technology page , show a reduction in abdominal circumference, hip circumference, weight, BMI, body fat and blood sugar. On average, Slim Sonic users lose between 5.5 cm and 6.7 cm of waistline in 6 sessions and 2.5 cm to 3 cm for each thigh, saddlebags, etc.
Scientific studies conducted in the past confirm these results. In particular, the research of Dr. Hausswirth, director of INSEEP research from 2012 to 2016, published in the American journal Frontiers in Physiology in October 2019.
It should be noted that the loss achieved also depends on the mass of fat to be destocked. For the sportsman, the action of the use of Slim Sonic is also beneficial: For the sportsman seeking to improve his performances, Slim Sonic makes it possible to bring a complementary source of energy which is directly placed at the disposal of the muscles. This contribution in energy is additional fuel, the sportsman will thus be able to consume more and thus gain in performance.
For the athlete looking for muscle definition (dryness for bodybuilders for example), he can target the areas to be destocked and in a few sessions, lose the fat on the targeted area to obtain the desired muscle definition.

Thanks to ultrasound, while losing fat in a targeted way, you firm up the skin, smooth out the dimples (cellulite) and thus gain tone.

For the moment, our products are not available in stores, but you can test our modules at our partners (physiotherapists, gyms…)

Two of our modules are available for rental: S-660 and L-1440 in France and Switzerland.

To do this, go to the rental section of our store.


If you wish to treat the belly, all our modules are adapted: Sonical, S-660, M-840, L-880, L-1440.
For thighs, buttocks and saddlebags, use the smaller modules: Sonical, S-660, M-840.
For the arms, knees, calves and pectorals, we recommend using Sonical and the S-660.

Slim Sonic is used within the framework of a physical activity so that part of the released fats are consumed.
Physical activity promotes vasodilation and acceleration of lymphatic circuits, which improves results.

You can do all kinds of activities with our modules.
Whether it’s sports (cross-training, aquaerobics, rowing, weight training, fitness, cycling, brisk walking…) or daily activities (walking, cooking, cleaning…), your imagination is the only limit!

It is imperative to respect the daily energy balance during a cure. Slim Sonic combined with your diet must be equal to your energy needs.

For example, with an L-1440 session, you will de-store 1440 Kcal in 40 minutes. That is to say that you will make 1440 Kcal available to your body.
If your daily requirement is 2440 Kcal, by using Slim Sonic, you will be able to bring only 1000 Kcal by your daily food in order to be at 100% of your daily requirement.

Little extra: everything you burn during your physical activity, you can re-consume.
For example: an energy expenditure of 40 minutes on a treadmill is equivalent on average to 300 Kcal. These burned calories can be added to your diet.

If your daily requirement is 2440 Kcal, your physical activity consumes 300 Kcal and you use the 1440 model, you will be able to eat the equivalent of 1300 Kcal to reach 100% of your daily requirement.

However, you should not use Slim Sonic in the following cases:

  • During the entire pregnancy period and at least 6 months after delivery.
  • If you wear a Pace Maker.
  • If you have metal plates or screws in the treated areas.
  • If you have cancer or metastasis.
  • If you have skin lesions in the treated areas.
  • If you have an unhealed fracture in the treated areas.
  • If you have recently had a transplant.
  • If you have bone prostheses in the treated areas.

As with any product, Slim Sonic may not work as well in some cases:

  • Menopause
    The hormonal changes generated by menopause can temporarily block the transformation of fat. If this is the case, wait until the end of this period to repeat your treatments. As an indication, the success rate, even during this period, is 80%.
  • Tinnitus
    For people with sensitive ears, SLIM SONIC may be disturbing. If this is the case, we advise you to forego the treatment.
  • Antidepressants
    Some antidepressant treatments can also block the transformation of fat. However, we note that in 90% of the cases, the treatments with SLIM SONIC work.
  • Cortisone
    Cortisone treatments can cause weight gain and water retention in some patients. With a SLIM SONIC treatment, you can maintain your body shape, but it is more difficult to reduce your abdominal circumference.


Depending on the country you are in, payment methods may vary.

In France, you can pay by card, bank transfer, PayPal and in several times thanks to Alma and FLOA Pay.

In Switzerland, you can pay by card, bank transfer, PayPal and in several installments with HeidiPay.

In Italy, Luxembourg, Spain, Portugal, Belgium, Germany, the Netherlands, Austria and Ireland, you can pay by card, bank transfer, PayPal and in installments with Alma.

For other countries, payment is only possible by credit card, bank transfer and PayPal.

Payment in installments is available for some countries:

  • Alma is available in France, Switzerland, Italy, Luxembourg, Spain, Portugal, Belgium, Germany, Netherlands, Austria and Ireland for payments in 2, 3 and 4 times from 100 to 3200 €.
  • FloaPay can be used in France for payments in 10 installments from 200 to 3000 €.
  • PayPal can offer you a payment solution in 4 installments from 30 to 2000 €.
  • HeidiPay is available in Switzerland for payments in 3, 4, 6 and 10 times up to 5’000 CHF.

Once at the last step of your order, you can select the payment in several times thanks to our partner following your choice. You will then be redirected to their site.


All our products are delivered internationally. If you have any problems with your order, please do not hesitate to contact us, we will find the best solution for your order together.

Once your order has been placed, we will ship your package within 10 working days. You will receive a tracking from our logistics partner on your mailbox to follow the progress of your order.

The delivery is made by Swiss Post in Switzerland.
For France and the rest of the world, shipping is provided by Colissimo.

Delivery is free in France and Switzerland from $ 150


The chat is open every day:

  • Monday to Friday from 10 to 12 am and from 1 to 7 pm,
  • the WE from 10 to 12 am and from 5 to 8 pm.

You can contact the customer service by email at
and by phone from Monday to Friday from 8am to 7pm at +41 (0)22 920 25 25.

A problem with a module?

All our new products have a 2 year warranty. Products reconditioned as new are guaranteed for 18 months and the little used ones for 12 months.

You bought one of our modules and changed your mind? Whatever your reasons, you can return your module within 14 days for a refund or exchange of your returned items in good condition. For this, please contact us, we will provide you with a return form to send your package.

Before sending a product for service, please check that the module is not out of battery.

If the problem persists, please follow the procedure indicated here on our page dedicated to the after-sales service.

After the 14-day cooling-off period, we cannot offer a money-back guarantee, as we do not accompany you during your sessions and during your use.

However, if your module has a problem, you can send it to us for service.