Charging by Solar Power, USB or Battery - 1. When the solar power is enough, you can charge cat repellent by the solar panel placed on the top of the device. 2. Equipped with USB interface and USB charging cable, you can charge the cat repellent via USB. Outdoor Cat Repeller - Outdoor Cat Repeller is waterproof (Waterproof Rating: IP66) . This means it can withstand normal rain from all directions. Note: Although the animal repellent is waterproof, in order to maximize the life of the product, if it is raining heavily or the weather is very bad, it is recommended to bring it inside. Two Methods of Repelling - Ultrasonic and LED Light - Depending on the selected frequency, the Cat Repeller can release pet-hated ultrasonic or LED flash to repel animals, such as cats, dogs, squirrels, deer, bears, birds and other animals. Adjustable Sensitivity and Frequency - You can adjust the sensitivity and frequency according to your needs, etc. Please read the user manual for more information. Environmental Protection - cat repellent uses ultrasonic waves and flashing LEDs to repel animals without harming animals or causing environmental damage. You can place it wherever you want, for example: garden, orchard, farm, etc.