With the latest ultrasonic pest control technology, each repeller plug-in uses sound waves to disrupt the central nervous system, pests, mice, rats, spiders, fleas, cockroaches, bedbugs beds and mosquitoes have nowhere to hide and will be effectively repelled. This pest repellent is effective for an area up to 120 square meters. Please note that ultrasonic waves cannot pass through walls and solid objects. Installing insect repellent in a room is recommended. It works by plugging the insect repellent into the socket and the breathing light starts working with the flickering. Insect pests will be repelled and driven away within 3-4 weeks with the use of this insect repellent. Make sure there are no barriers like curtains or covering cabinets in front of the repellent for the perfect effect. This ultrasonic insect repellent is only audible to pest insects. Humans and pets will not be affected, and pregnant women and children will not suffer any harm. But if you keep the hamster as a pet
