Charging by solar power, USB or battery - 1. When solar power is enough, you can charge the cat repellent via the solar panel on the top of the device. 2. Each cat repellent contains 3 AA batteries inside (removable, but tools are needed to remove the screws) to charge the animal repellent. Waterproof Ultrasonic Repeller - The INTEY animal repeller is waterproof (Waterproof Index: IP44 ). This means it can withstand normal rain from all directions. Note: Although the animal repellent is waterproof, it is recommended to bring it indoors to maximize the life of the product when there is heavy rain or the weather is very bad. Two repellent methods: ultrasonic and LED Light - Depending on the frequency selected, the animal repellent can emit animal-hating ultrasonic or LED flashes to repel animals such as cats, dogs, squirrels, deer, bears, birds and other animals. It is an important partner to protect your garden. Adjustable sensitivity and frequency - You can adjust the sensitivity and