Charging by Solar Energy, USB or Battery - 1. When the solar energy is sufficient, you can charge cat repellent by the solar panel placed on the top of the device. 2. Each cat repellent has 3 AA batteries inside (removable, but tools are needed to remove screws) to charge the animal repellent.Waterproof Ultrasonic Repellent - INTEY animal repellent is waterproof (waterproof rating: IP44). This means that it can withstand normal rain in all directions. Note: Although the animal repellent is waterproof, in order to maximize the life of the product, if it rains heavily or the weather is very bad, it is recommended to bring it indoorsTwo Repellent Methods: Ultrasonic Light and LED - Depending on the frequency selected, the animal repellant can release ultrasound or LED flash hated by the animal to repel animals, such as cats, dogs, squirrels, deer, animals. bears, birds and other animals. It is an important partner to protect your gardenAdjustable Sensitivity and Frequency - You can adjust the sensitivity and frequency as you need, for example: Set the frequency to mode 1 to stay away from mice and dogs, etc. Set to mode 2, to repel animals such as cats, raccoons, skunks, etc. Note: In most cases, the recommended frequency is the most effective repelling frequencyEnvironmental Protection - Cat repellent uses ultrasonic waves and flashing LEDs to repel animals without harming animals or causing environmental damage, you can place it anywhere you want, for example: garden, orchard, farm, etc.Suitable for novices