The professor who refused to give up
It started at home
Örjan Johansson has always had an interest in sound and how it affects us. He trained as a civil engineer and continued as a researcher at Luleå University of Technology (LTU), where he is now a professor of technical acoustics. But his biggest breakthrough did not come in the lab – it started at home.
In the family house, he was tormented, like many other homeowners, by mice and rats. Traps, poison, ultrasonic devices – nothing helped. The problem sparked a thought: if no solution works, why not create one yourself – based on real science?
Why the common repellents do not work
When Örjan began investigating the market, he saw the same pattern: cheap ultrasonic devices based on a single high-frequency tone. Mice and rats are smart. When the sound poses no threat, they quickly learn to ignore it. The result is that the repellents lose effectiveness in just a few days.
Tests from, among others, Villaägarna confirmed the suspicion: the devices were a scam. The mice literally walked right over the devices – completely unaffected.
Scientifically documented effect
The technology was tested in practical studies, including in a basement of a multi-family house with a severe rat invasion. Cameras documented how 48 rats decreased to zero. The few that dared to return quickly turned back – and the effect lasted throughout the entire test period.
This time there were no doubts. Repello demonstrated a scientifically documented effect – something that no other rat or mouse repellent on the market had previously been able to prove.
The results form the basis for a study published by researchers at Luleå University of Technology (LTU) and Swedish University of Agricultural Sciences (SLU).
From research to your home
What began as a professor's personal battle against rats and mice has developed into a patented Swedish innovation that has already changed how we view pest control. Where other solutions promise but fail, Repello demonstrates scientifically proven effectiveness – time after time.
In practice, this means you avoid the scratching in the walls, the damaged wiring, and the fear of diseases. Instead, you get a home that is safe, toxin-free, and protected.
Now you can benefit from the same technology that has convinced the scientific community – order your Repello today and make your home a place where neither rats nor mice dare to stay.
Ready, set, rodent-free
Repello is easy to install, completely maintenance-free, and ready to start protecting immediately.