HNCSMILE-191A, Professional Electronic Pest Repeller Repellent; Ultrasonic Wave, Scare All Kinds of Animal Away, Battery Included, Garden Necessity Professional electronic pest repellent, Use ultrasonic wave deterrent dogs,cats, deer, raccoons, mice. skunks, squirrels all kinds of animals. Solar energy technology, the item can charge itself under sun, Very very convinient. rechargeable batteries included. Eco-friendly, Non-toxic, No poison chemicals. A scientific way to solver your pest trouble. Can be mounted in the ground with the provided aluminum stick, or can be hung on a wall using the slot on the back. An essential tool for home garden. Very easy to install and use, it will work automatically. no need setting.