Ultrasonic Pest Repeller, Indoor Pest Control, Pest Repellent Ultrasonic Plug in, Indoor Ultrasonic Repellent for Roach, Rodent, Mouse, Bugs, Mosquito, Mice, 6 Packs

Simply plug the pest repellent ultrasonic device into a power outlet, and it will start working when the blue light turns on. However, solid walls, carpets, curtains, and any sound absorption material may weaken the effect of the ultrasonic wave, so we recommend using one unit per average-sized room with a pest problem. Additional units may be required for larger areas. 1. The number of pests may increase in the first few days. And the ultrasonic repellent will drive them away completely for good about four weeks later. 2. It's normal that the rodent or insect will increase at the beginning of the using days because they are getting away from the living place after the attack of the ultrasonic. Reduction in pest activity will occur within 2-3 Weeks. 3. To keep the pest from coming back, continued use is recommended.