Set of 2 - Solar Powered Cat Repellent & Deterrent (Batteries Included) - Ultrasonic Cat Scarer This cat repellent is powered by an amorphous solar panel - solar power is economical and environmentally friendly PIR (passive infrared sensor) cat deterrent can detect motion within a 30ft (9.14m) radius Is effective in repelling various pests - for example, cats, dogs, foxes, and rodents This cat scarer covers 110 arc, and 30ft ground area - total of 2,425ft Easy to install with handy ground spike and requires no cords or cables