Is the cat housekeeper mousetrap harmful to three-year-old children?

Harmless. According to Zhihu's inquiry, the cat housekeeper's mousetrap is harmless to three-year-old children. Mouse repellent is a tool based on professional electronic technology design and years of research on mice in the scientific community, which can generate ultrasonic waves with a certain frequency to drive away mice. The purpose of use is to create a high-quality space without rats and insects.