EASY TO USE: Connect the device to a power outlet 10 to 40 cm above the floor. The ultrasounds are not audible. Install insect repellent in every room. Please note: ultrasound can quickly be blocked or absorbed by bulky partitions or furniture. Upgraded version: Our ultrasonic repeller affects the nervous system of rodents, forcing them to escape. With intermittent changes in ultrasound frequency, mice and rats were unable to adapt. Satisfaction Guaranteed. Safe: Children and pets cannot hear the ultrasonic repeller. It is safe and only affects rodents and pests. It does not emit electromagnetic waves! It’s safe for your family. Non-Chemical: Electronic repellents only emit ultrasonic waves. This rodent repellent is odorless, chemical free and does not kill animals. Save Money - Low Consumption: Turn on the repellent all day. It only consumes 0.096 kWh/day. Electricity costs are extremely low. You don’t need to load it.