The title surely sounds long and pompous, but it’s actually a trap or better said a device that uses ultrasounds to fight against rodents. The explanation is quite simple: the rodents can hear some sounds that the human ear can’t and they find them really disturbing, some of them even being able to physically hurt them (especially the ears). So if you ever have problems with rodents that are outside your house and you don’t know what to do to get rid of them without using the old fashioned but cruel methods, you might purchase one of these from the store or even from eBay for about $26-39 and even for less ($22) on the Amazon..
The sound produced by this device can also affect the nervous system of the rodents, so do not purchase it if you have a hamster as your pet. Any way, let’s hope you will never have this problem because rats and mice are not such a joy, but if you do you’d better be prepared.