Ultrasonic Insect Repeller kill mosquitoes etc. in your room. cockroaches, mice, moths and other insects. Safe: Ultrasonic Rodent Insect Repellent People and pets can’t hear sound. No harm to the health of humans and pets. Easy to use: This machine should be installed 80-120 centimeters from the ground. And vertical to the floor and plug into the power outlet. Wide Coverage Area: This pesticide can be used anywhere in the house, such as in the kitchen, bedroom, basement, etc. floor, garage, warehouse, etc. As ultrasonic devices cannot pass through the wall, the installation of a control device for one or more separators is necessary for a large room.