2022 UPDATE TECHNOLOGY: The dual ultrasonic and electromagnetic chips of our ultrasonic pest repellers emit frequencies ultrasonic interfering the auditory and nerve system of the pest, making them feel uneasy and uncomfortable so that pests, mice, rodents and mosquitoes away from your home.Two light modes:The light can be chosen - on and off, it is more effective to turn the light on, the light can also act as a small night light. Your sleep won’t be disturbed.It can also be used as a night light. It’s advised to turn on the light for a better effect of repelling mosquitoes.WIDE EFFECTIVE COVERAGE: The product is effective in an indoor area up to 1800 sq. ft. It’s widely used in homes, warehouses, offices, gardens, hotels, etc. We recommend you to install one for each room because the ultrasound cannot penetrate walls and solid objects. But for areas with serious Vermin, we suggest install 2 or more devices for other room. They aren’t effective for other rooms if you install device
