the main one is the lack of explanatory notes in French which is normally compulsory in our country. It is unclear whether ultrasound emissions change frequencies that rodents do not get used to it. To test the efficiency, I placed anti-mouse bait and they arrived in a group of two garage despite the ultrasound. Maybe the camera was not positioned at ground level, without obstacles? A notice could indicate! The mice took food. Time will tell if they are really divided or have only hide ...
