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 it into a wall outlet. It can completely eliminate mosquitoes, fleas, ticks, mice, moths, etc. No need to clean up dead insects, keep your home always clean 100% SAFE FOR CHILDREN AND PETS ---- Ultrasonic repellent plug-in completely repels pests physically. It constantly emits ultrasonic waves which 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 outlet, press the switch, fully automatic intelligent ultrasonic frequency conversion destroys the living space of pests, when the output is from 24 to 50khz, the green light is on, and when the output is 50 to75khz, green light and blue light are both on, 75-100khz output. Green, blue and red lights are turned on at the same time, repeatedly disturbing the auditory nerves of pests, effectively eliminating these rodents