Mice, bats, these animals are to communicate with ultrasound, rodents auditory system is well developed, very sensitive to ultrasound, to determine the source of the sound in the dark, when the pups threatened to issue 30-50kHz ultrasonic, when eyes can not rely on ultrasound and echo back to the nest issued (foreign References: Allin and anks1971: Carden and Hofer 1992), in the face of adult rats emit an ultrasonic crisis may help, it may be issued at the time of mating ultrasonic expressed happiness, it can be said ultrasound is rodents language. Rodent auditory system is 200Hz-90000Hz (Foreign References: Fay 1988, Warfield 1973, andThe Nature of Sound)

Mole Repeller is a professional electronic technology use after years of study design and the scientific community rodents, developed a device capable of generating ultrasonic 25kHz-70kHz, which is generated by the ultrasonic device can effectively stimulate and can lead to mouse class feel threatened and uneasy. This advanced technology from Europe and pest control concept, purpose is to create a "no mouse, no pests quality space" and create insects, rodents, etc. can not survive the environment, forcing them to automatically migrate, not within the scope of prevention area growth and reproduction, to eradicate rats, pests purposes.