Advanced Dual Power Shock - New electromagnetic and ultrasonic technologies deliver powerful shocks. Poisons and insecticides only work against a few pests at a time, while the ultrasonic repellent plug-in is effective against many, such as mice, mosquitoes,ants, cockroaches, spiders, etc. Improve health and cleanliness - just plug into a wall outlet. It can completely eliminate mosquitoes, fleas, ticks, mice, moths, etc. No need to clean up dead bugs, keep your home always clean 100% KIDS AND PET SAFE---- The ultrasonic repellent plug-in completely repels pests physically. It constantly emits ultrasonic waves that make pests uncomfortable and flee your home. Compared with traditional pesticides, ultrasonic insect repellents arenon-toxic, odorless, harmless to people and pets (except hamsters and other pets), and are safer. Easy to use----just plug it into the power socket, press the switch, the fully automatic intelligent ultrasonic frequency conversion destroys the living space of pests, when the output is 24 to 50khz, the green light is on, and when the output is 50 to75khz, the green light and blue light are both On, output 75 to 100khz. The green, blue and red lights are on at the same time, repeatedly disrupting the auditory nerves of the pests, effectively eliminating those rodents