Ultrasonic technology (20-45kHz): Automatically cycles sound waves to interfere with the nervous, auditory, and olfactory systems of pests, effectively repelling rodents, bats, and insects. Simply plug it into any power outlet. Each device can protect up to 93 square meters of open area. One device per room—kitchen, bedroom, garage, attic, basement, office, trailer, etc. For areas with severe pest infestations, two or more devices can be installed. Effectively repels mice, squirrels, bats, cockroaches, ants, spiders, fleas, mosquitoes, moths, bedbugs, etc., without the need for traps, bait, or residue. 100% chemical-free, odorless, and quiet. Low power consumption (1-3 watts) and includes a soft nightlight, ideal for hallways or nurseries. Expect a slight increase in pest activity on the first day, with noticeable changes within 1-2 weeks. Optimal results are achieved after 3-4 weeks of continuous 24-hour use. This product is technically supported in the US—accept or return.