The mousetrap is a device that can generate 20-55 kHz ultrasonic waves by using professional electronic technology and years of research on mice in the scientific community. The ultrasonic wave generated by this device can effectively stimulate and make mice feel threatened and uneasy. This technology comes from the advanced pest control concept in Europe and America, and its purpose is to create a "high-quality space without rats and insects" and create an environment where pests and rats can't survive. Rodenticide forces them to migrate automatically and cannot reproduce and grow in the controlled area, thus achieving the purpose of eliminating rats and pests. The generated electromagnetic wave has a frequency of only a few hertz. The frequencies of ultrasound and infrared rays are also beyond people's hearing range, and the power of all radio waves is extremely small, so it is absolutely harmless to the human body, unless you buy a fake! ! !