[High quality ultrasonic pest repeller]: If you consider a non-chemical approach to reject pests, we recommend ultrasonic repellent are devices that emit constant noise at a high frequency so that people can hear it. These sound waves are designed to deter common house pests such as cockroaches, spiders, mosquitoes, ants and rodents. [Ultrasonic action and friendliness]: the ultrasonic insect repellent uses ultrasonic waves to stimulate the brain of pests and the auditory nerve to repel pests from your home. Say goodbye to harmful toxins, dangerous chemicals and traps, work without disturbing people or pets and be respectful for your family and pets. [Wide coverage area]: the mouse repellent can be used to induct mice, rats, cockroaches, spiders, insects, mosquitoes, bugs and ants. It is recommended to install this device at a distance of 8 to 27 inches from the floor and use it in houses, offices, apartments, supermarkets, warehouses, hotels or other places. [Environmentally friendly and energy saving]: the pest repellent has the following features: no trap, no noise, no radiation and no peculiar smell. Low power consumption, energy saving and environmentally friendly. Based on ultrasonic pest control technology, this device provides a simple and quiet way to deter pests. You will notice a significant decline in pest activity within 3 to 4 weeks without the need to use sprays or traps. [Night light function]: the process is equipped with a night light. Night light can encourage pests to leave the colony. At night, when the night light is on, the machine starts to work, and the soft light allows you and your family to sleep more quietly. Quiet ultrasound does not affect your work and sleep.