Please note that ultrasound does not pass through solid objects. So it is best to plugin the repeller in open place, do not hide behinde curtains, carbins, audio equipment or other solid material that may reduce the effectiveness of ultrasonic waves.

The ultrasonic insect repeller should be installed at 12-60 inches from the ground and perpendicular to the ground with the plug connected to the power socket.

In order to increase the effect, it is recommended to install an insect repeller indoors. For larger rooms, such as warehouses, it is better to install two or more insect repellers.