About Us

Prüfengel offers authentic consumer tests in which real users share their experiences with products. Our tests are based on practical applications in everyday life and reflect the opinions of consumers. As we focus on consumer tests, we do not carry out material, long-term or laboratory tests. Our aim is to provide honest feedback to help you make a purchasing decision. For a detailed insight into our comprehensive evaluation process, which forms the basis of all our product reviews, please click here.

ISOTRONIC
Marten+mice repeller

The marten+mouse repeller from ISOTRONIC made a very good impression in our test.
As well as being easy to install using cable ties or screws, it also impresses with its handy size and mobile use. The product uses ultrasonic waves to provide permanent protection against martens within an effective area of up to 40 square metres. No chemical agents are used in the process. Furthermore, the battery life is around 8 months and has an automatic switch-off function for use in the engine compartment. Nevertheless, more explicit information about possible water resistance would have been desirable.

Advantages

✅ No active chemical ingredients
✅ simple installation
✅ Family-run company
✅ Mounting material and batteries included

Disadvantages

❌ No information on water resistance

The first impression

The packaging and labelling

ℹ️ Here we take a closer look at packaging. Sustainability is becoming an increasingly important factor. In addition, adequate protection of the product must of course also be ensured.

CriterionRemarkPoints achieved*
Product protectionCarton is sturdy, product sufficiently protected100 points
Sustainability PackagingNo unnecessary packaging waste, no use of plastic95 points
Product labellingLabelling available on the product and carton100 points
MiscellaneousHigh-quality packaging, also suitable as a gift100 points
Total99 points
Weighting: 15%
*The maximum score is 100 points
Marder+Mäuse Vertreiber
Marten+Mice Repeller
Packaging

The marten+mice repeller from ISOTRONIC arrived for our test in the typical shipping box. It was undamaged and easy to open by removing the adhesive strip. The box contained the paper-wrapped Marder+Mice Repeller and its accessories. The packaging method ensures that the product is optimally protected from scratches and dirt. Product protection was therefore fully guaranteed and the Marder+Mice Repeller was delivered in perfect condition.
The packaging is also completely recyclable. In this respect, the product leaves a very good first impression. Neither the device nor the packaging used was damaged.

After unpacking

Package contents and instructions

ℹ️ Most people’s first impression after unpacking is immediately memorable. Are the contents of the pack complete and does the manufacturer make it as easy as possible for me to use the product straight away?

CriterionRemarkScore achieved*
Package contents & scopeMarten+mouse repeller including batteries and mounting material100 points
Instructions for use7 languages (including German), clearly written100 points
Contact informationCan be found on the box, no customer hotline available90 points
Total97 points
Weighting: 15%
*The maximum score is 100 points

After unpacking, there were five things on the table. In addition to the marten+mice repeller , batteries, installation material and a small screwdriver were supplied. Furthermore, the correct handling of the product was described in the enclosed 7-language instructions for use and on the packaging. The contact information can be found on the product box, whereby the e-mail address is only displayed by scanning a QR code. However, there is no customer hotline.
Nevertheless, this is a very good way to send a product.

The first time in your hand

Product processing and appearance

ℹ️ Before we start the practical test, we take a close look at the product processing. How high quality are the materials used? Is the look and feel satisfactory?

CriterionRemarkScore achieved*
Visual appearancePlastic, but very good visual appearance100 points
ProcessingVery good workmanship, no edges, but minor flaws90 points
StabilityVery stable95 points
Sustainability of the productNo information on sustainability, but attention was paid to waste avoidance in the packaging75 points
Total90 points
Weighting: 20%
*The maximum score is 100 points
Marder+Mäuse Vertreiber
Marten+mice repeller incl. batteries and mounting material

Firstly, it should be mentioned that the marten+mouse repeller makes a good visual impression. It has rounded corners, but minor processing faults. The housing of the product is made of plastic, which nevertheless fits very well in the hand. The device also impresses with its low weight and sturdy workmanship. Furthermore, the Marder+Mice repeller cannot be bent and remains rigid.
Although there are only references to sustainability in the packaging, the product itself does not use any chemical substances. Research and development was also carried out in Germany. The manufacturer also offers a two-year guarantee.

This is what our practical test showed

Does the manufacturer keep its advertising promises?

ℹ️ Our practical test is the most relevant and therefore the most important. Here, the product has to undergo a wide range of criteria and tests. We check the functions and product promises of the test article.

CriterionRemarkScore achieved*
FasteningScrew on or cable tie90 points
StructureSmall screwdriver85 points
NoisesNot perceptible90 points
SuitabilityNo information on water resistance70 points
Control lampWorks perfectly, quiet click90 points
Effectiveness and battery lifeNot assessable in the test period
Total85 points
Weighting: 30%
*The maximum score is 100 points

To use the marten+mouse repeller, the batteries (6 x AAA) must first be inserted. Opening the housing is a little more difficult at first because the screwdriver supplied takes some getting used to and the cover can only be removed with additional tools. The device can then be installed in the engine compartment, barn, loft or garage , for example, using the cable ties or screws supplied. No plugs are included, but are not necessary due to the weight.
Due to the short, intermittent emission of high-frequency sounds, the manufacturer promises a battery life of around 8 months. In the case of an engine compartment installation, the device only emits its high-frequency tone when the vehicle is stationary. Otherwise, the device sounds continuously at the specified interval with its 23 kHz. The frequency was not perceptible to us during the test, but the red indicator light confirmed that the device was working properly. The flashing light emits a soft click, which should not be a problem if the device is installed in the locations mentioned. How the product works in practice would have to be determined in a long-term test. Unfortunately, the manufacturer does not provide any explicit information about possible water resistance, meaning that suitable use for certain outdoor locations cannot be guaranteed. Only the removal before washing the engine when used in the engine compartment was pointed out.

Price/performance ratio

and ratings from consumers

ℹ️ Finally, we look at how the product compares to the competition. Can it keep up with the competition in terms of price and quality? Would we generally recommend buying it? We also analyse consumer reviews and check whether the critical and positive reviews are actually justified.

CriterionRemarkScore achieved*
Price / performance ratioVery good95 points
Rating cut3.9 out of 5.0 on Amazon45 points
Total70 points
Weighting: 20%
*The maximum score is 100 points

On the Amazon platform, consumers have given the product an average rating of 3.9 stars. Some complain that the product has no effect on martens. In contrast, other reviewers were able to confirm the positive effect. Opinions also differ on the service life of the battery. However, many customers like the compact design and easy installation. In our practical test, we were able to confirm that installation is effortless and that the device has a handy design. We cannot make a general statement about the actual benefits, as this would require a practical test over a longer period of time. Furthermore, we consider more explicit information on any water resistance to be useful.

Prices of up to €138 are charged on the internet for equivalent products. Very inexpensive products, on the other hand, are available for as little as €7. The marten+mice distributor from ISOTRONIC is therefore in the lower price segment with a current price of €34.95. Consequently, the price ratio is very good for the quality and scope of services you receive.

Overall result

WeightingScore achieved*
1. packaging & labelling15%99 points
2. package contents & instructions15%97 points
3. product processing & appearance20%90 points
4. in the practical test30%85 points
5. price/performance & consumer reviews20%70 points
Total85 points
*The maximum score is 100 points
Marten+mice repeller
of the brand
ISOTRONIC
achieved
85
Points in our test and therefore passed. The test was carried out in the test period
10/22
and is stored in our database under the licence number
220912697
. Further information on our test procedure can be found at www.pruefengel.de/testverfahren.

The practical tests are based on careful observations and do not include long-term or laboratory tests. The test judgements reflect the personal impressions and opinions of the testers who try out the products in everyday use. We would like to emphasise that these evaluations do not claim to be exhaustive and may reflect both subjective and objective impressions. The evaluations are made to the best of our knowledge and belief, without any liability being assumed for the accuracy or completeness of the test results. It is important to note that our tests are not based on legal requirements, medical effects or specific ingredients of the products. We rely on the advertising claims and information provided by the manufacturers, but use of the information is always at your own risk. Our efforts are aimed at ensuring a serious and thorough testing procedure, which has been developed in a long and professional process in close co-operation with our testers.

The practical tests are based on careful observation and do not include long-term or laboratory tests. The test ratings reflect the opinion of our experts and are based on careful analysis. We would like to emphasize that these evaluations do not claim to be exhaustive and reflect both subjective and objective impressions. The assessments are made to the best of our knowledge and belief, without any liability being assumed for the accuracy or completeness of the test results. It is important to note that our tests are not based on legal requirements, medical effects or specific ingredients of the products. We rely on the advertising claims and information provided by the manufacturers, but use of the information is always at your own risk. Our efforts are aimed at ensuring a reputable and thorough testing process, which has been developed in a long and professional process in close cooperation with our experts.

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Evaluation process

You can find a detailed insight into our evaluation process, which forms the basis for our product ratings, here:

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Our product evaluations are carried out exclusively through direct, on-site tests. This ensures a detailed and specific examination of the product properties. You can find more information about the test procedure here.

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