The rat repeller is a kind of tool which can produce ultrasonic wave of certain frequency to drive rats based on the professional electronic technology design and many years of scientific research on rats. Its purpose is to create a high-quality space without rats and pests.
Mice, bats and such animals communicate by ultrasound. The mouse's auditory system is very developed, very sensitive to ultrasound, and can judge the source of sound in the dark. Pups can emit 30-50 kHz ultrasound when threatened, and can return to their nests by the ultrasound and echo when they don't open their eyes. Adult rats can send out an ultrasonic call for help when they are in crisis, and also send out an ultrasonic to express happiness when they mate. It can be said that the ultrasonic is the language of rats. The hearing system of mice is between 200Hz and 90000hz.
The ultrasound generated by the rat repeller can effectively stimulate and cause rats to feel threatened and uneasy. It is generally said that it is better to kill rats than to drive them away. In fact, there is a certain amount of "support" in a certain space. If you kill a mouse, a new mouse will be born, or a new mouse will invade. If we use ultrasound to worsen the living environment of mice and reduce the "supply", there will be no new mouse invasion, so it is better to "kill mice" than "drive mice".