Upgraded Frequency Conversion Technology：Insect repellent plug in indoor features a frequency conversion dual-wave technology. It can simulate and interfere with the auditory and nerve system of the mouse and pest, being extremely irritating to them, keeps pests and rodents away from your home or office. Safe for Humans and Pets：Our mouse repellent ultrasonic plug in emits a consistent frequency of 22- 55 kHz that is inaudible to humans and pets, making its use significantly safe around kids and pregnant women. With no smell or noise, and less power consumption, this ultrasonic spider repellent offers maximum benefits. Noiseless：The ultrasonic waves that this ultrasonic pest repeller sends are far beyond the hearing range of human beings. But it is very effective for rodents and pests, ultrasonic waves let them leave your home quickly! Enjoy a peaceful & pest-free tight sleep without any concerns for noise, and keep your family have a good sleep. Wide coverage: The mosquito repellent ultrasonic is effective in an area of 800~1200 square meters. Since ultrasound cannot penetrate walls and solid objects, please place a mosquito repellent in each room. Apply in houses, office, apartment, supermarket, warehouse, hotel or other place. Highly effective insect repellent：Our mouse repeller plug in can be highly effective against most kind of insects and rodents through unique ultrasonic sound and electromagnetic waves. Such as mice, rats, ants, bugs, roaches, mosquitoes, etc.Manufacturer: Piymnys Style: ModernUltrasonic Pest Repeller – Mouse spider repellent ultrasonic plug in for mosquitos, mouse, roaches, spiders, fleas, rats, mice & bugs. Effective results within 3-4 weeks of continuous use by taking the ultrasonic pest repeller mouse repellent ultrasonic plug In podent repellent indoor. Our ultrasonic pest repeller applies the most advanced modern technology, emit ultrasonic electromagnetic wave, polar wave in bionic wave, etc. which stimulates the auditory system of fleas, rodents, roaches, mice, insect, mosquitoes, ants, rats, bed bugs and other insect pests, and makes them escape from the existing room. Suitable for home, kitchen, warehouse, store, hotel, office installation and use. It can give comprehensive and around the clock protection for you. Specifications: Rated Power：3-5W Power Supply Voltage: AC 90V-250V Power Frequency: 22~65KHz Effective coverage area: 800~1,200 sq ft The package includes 4 ultrasonic pest repellers