Traditional rat scares are about to become history. After several years of research in collaboration with Luleå University of Technology (LTU) and evaluated by the Swedish University of Agricultural Sciences (SLU), researchers have developed a new, patented Swedish technology: Repello.
It is not based on poisons. It does not rely on traps.
Instead, Repello uses invisible sound waves to activate the reptilian brain of rats and mice - triggering a reflexive panic flight.
- It's not about volume, but about the right signals to the nervous system. When the brain perceives danger, the rodent flees immediately - and doesn't come back. - Örjan Johansson, professor of technical acoustics at LTU.
Why regular ultrasonic scarers don't work
Most products on the market are based on a simple, constant tone. The problem?
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Mice are highly adaptable.
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After a few days, they learn to ignore the sound.
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The result: the mice are back - and the homeowner is left with a useless plastic shell.
Repello is different.
The science behind Repello
Researchers at Luleå University of Technology (LTU) and the Swedish University of Agricultural Sciences (SLU) decided to get to the bottom of the question: How does sound actually affect the nervous system of rodents?
In several laboratory tests, they mapped how different frequencies interacted with the brains of rats and mice. The results were groundbreaking:
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Complex sound sequences - not one tone, but patterns that constantly vary.
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The sounds activate the reptile brain's flight reflexes - the oldest part of the brain that controls instinctive responses.
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The effect: mice flee immediately and avoid the site even afterwards.
- "It's not about volume," explains Örjan Johansson. "It's about tricking the brain into thinking an acute threat is coming. The reflex is immediate. You can't get used to it.
👉 Read more about Repello and order here
Why Repello is different
✅ Based on research from LTU & SLU
✅ Patent protected Swedish technology
✅ Tested on multiple species with proven efficacy
✅ No poisons or traps - safe for children and pets
✅ Effect that mice and rats can't get used to
Frequently asked questions
Is Repello dangerous for humans or pets?
Frequency. The frequencies are specifically adapted for rodents. Cats, dogs and humans are not affected.
How quickly do you see results?
In tests, the effect was immediate - rodents flee within minutes. In homes, it often takes 1-3 days to become completely free.
Need more devices?
One unit covers 60 m². If you have larger areas, multiple units are recommended for full coverage.
