environmental: no chemical pesticides, no traps and therefore no dead animals. Thanks to the intelligent infrared motion detector, this new version is useful for a wide range of animals: fox, cat, dog, bear, squirrel, rabbit, deer, skunk, bat , the raccoon etc.It is an important partner to protect your garden.Charging by Solar Energy, or Battery: When the solar power is sufficient, you can charge cat repellent by the solar panel placed on the top of the device. Adjustable Sensitivity and Frequency: You can adjust the sensitivity and frequency according to your needs. Please read the user manual for more information. Note: In most cases, the recommended frequency is the most effective repelling frequency. Environmental Protection: Cat repellent uses ultrasonic waves and flashing LEDs to repel animals without harming animals or causing environmental damage. Note: The data is all manual measurement, please allow 1 - 3cm error, due to the difference in light and display, there will be a certain color difference , depending on the physical object received.