Infrared Sensor: The nose of the owl repeller is an infrared (PIR) sensor capable of detecting animals of all sizes. The action area covers an arc of 120 degrees and a distance of up to 10 meters. When the pet approaches within 10 meters, the motion sensor will emit ultrasonic sounds and the LED light will make the pet feel uncomfortable and encourage it to run away. Protection Ultrasonic: The dog repeller only emits 13.5kHz-45.5kHz ultrasonic waves, which are harmless and harmless to human. It is also free of chemicals and hazardous materials. It only repel animals, without hurting them. Humane design will not harm your cats, dogs or other pets. [Ultrasound + Powerful Flashing LED + Sound Alarm] The owl has 14 powerful LEDs in its eyes. As for its beak, it is an ultrasonic transmitter. When the external repeller detects movement and body temperature, it emits a mixture of different ultrasound waves, powerful flashing lights and an audible alarm to scare animals away. There is no harm to humans or animals. [USB Charging and Solar Powered] The owl is equipped with a solar panel on its head. It allows the owl to absorb energy when there is sunlight. Besides, it is equipped with a 2000mAh rechargeable lithium battery. You can also charge the ultrasonic repeller via USB power. 5 adjustable modes: irregular and variable frequency for more effective hunting of the most aggressive animals that can adapt to a specific frequency band and are immune to it. IP66 waterproof and easy to install: this repeller for cats is waterproof to IP66 standard. It can withstand normal rain. Note: In the event of a thunderstorm or bad weather, it is recommended to shoot indoors. Can be installed in homes, gardens or decks, gardens, patios, driveways, fields, lawns, verges, garages, farms and anywhere else.