Review on 🐜 2021 Upgraded Ultrasonic Pest Repeller Plug-In - Indoor Electronic Pest Repellent for Fly, Bug, Cockroach, Spider, Mouse, Rat, Bat, Squirrel, Mosquito - Safe for Pets by Kristy Esposo

I ordered a couple of these items in March because I was desperate. I had a serious problem with mice and rats in the house as we live next to an open field. I've tried everything else and those pesky critters wouldn't go away. I received them and put them in, at first nothing happened, the mice/rats were still there, but after about 3 weeks there were no more rat droplets. At the moment my house is free of these animals. In all, I have five plug-ins scattered around the house. They work! I can sit in my living room without fear of seeing a mouse's tail go by.