Ultrasonic ProtectionThe dog repellents only emit 9.0kHz-70.0kHz ultrasonic waves, which is harmless to the human body and harmless to the human body. At the same time, it does not contain chemicals and dangerous products. It will allow driving only the animals without damaging them. The humanized design will not harm your cats, dogs or other pets. Infrared SensorThe nose of the owl repeller is an infrared (PIR) sensor, which can detect animals of all sizes. The effective area covers an arc of 120 degrees and a distance of 10 m. Once the pets enter within 33 feet, the motion sensor will emit ultrasonic waves and the LED lighting will make the pet feel uneasy and escape. Ultrasonic + strong LED flashing + sound alarm There are 6 strong LED lights in the eyes of the owl. As for his mouth, it's an ultrasonic transmitter. When the outdoor repeller detects movement and body heat, it emits a mixture of ultrasound of different waves, powerful flashing lights and an audible alarm to scare animals away. Harmless to humans or animals. USB Charging & Solar Powered There is a solar panel on the owl head. Let the owl absorb the energy when there is sunshine. It is also possible to charge the ultrasonic repeller via USB power supply. 5 Adjustable Modes: Irregular and variable frequency makes it more efficient to hunt the most aggressive animals which can adapt and become immune by a particular frequency band. IP44 waterproof and easy to installThis cat repellent is IP44 waterproof. It withstands normal rain. Note: In case of a storm or bad weather, we recommend putting it indoors. Can be installed anywhere in the home, garden or patio, garden, yards, paths driveways, lawns, borders, garages, farms and all outdoor areas.