Professional - Made with professional-grade smart chips, the ultrasonic repeller transmits 360 degree ultrasonic waves, The pest repellent is effective for an area from 80 to about 120 square meter. Multiple strike: Interfere with the auditory system, endocrine system and nervous system of mosquitoes, it causes them to escape and lose their ability to reproduce and invade. Safety - Professional grade ultrasonic repellent , does not use electromagnetic waves, no electromagnetic radiation; odorless and non-toxic; harmless to humans and pets. Ultrasonic frequency is inaudible to adult or child humans and pets, can be used 24 hours; The light is weaker, does not affect sleep. New Technology - The ultrasonic repeller uses a high frequency ultrasonic circuit to erase ultrasonic waves, propagates through many reflections of the environment to create a protective ultrasound network. Unlike other fixed frequency technologies, the ultrasound frequency is constantly changing within certain
