Review on 🐭 Advanced Electronic Indoor Ultrasonic Pest Repellent Plug-In System - Radarcan Mouse, Roach, Squirrel Repeller for Home, Office, Warehouse & Hotel - Sonic Pest Control with Ultrasound Technology - New Model 2021 by Shannon Harris

Used these many years ago to keep mice out of my house. I saw many people running down the stairs to escape the noise, it was creepy. I followed all the instructions for opposing walls to bounce sound off them and it worked great! The only problem was when my ex pushed the furniture down the stairs, put the sofa right in front of him and the next day it was covered in trash >.< Any cockroach that came into the house from outside died instantly between that one and a big jet. . What this thing does to mice is crazy.