Description Ultrasonic Pest RepellerUltrasonic pest control emits low-frequency (20-55kHz) sound waves, the frequencies of ultrasonic waves and electromagnetic waves are converted and coexist, which can effectively affect the neurological auditory system, ward them off quickly and effectively. Wide CoverageJust plug the ultrasonic pest exterminator into an outlet ordinary power supply, then the LED light turns on and it starts to work, easy to operate and convenient to carry. The manufacturer suggests using one unit for about 80-120 sqm. Safe and Environmentally FriendlyThe mosquito repellent is safe, odorless, chemical-free, non-toxic or radiative. With advanced ultrasound and jagged wave control, you can kill insects, mice, cockroaches, mosquitoes, ants and spiders. Easy to Use Pest RepellerMini size design, you just need to To plug the electronic rat repellent control into any outlet, be sure to install it vertically 20-80 cm from the floor. The blue light is on, which means it can be run automatically without a complicated installation process. You can see the pests disappear in 3-4 weeks.