As Seen on TV Bell Howell Motion Activated Ultrasonic Solar Powered Animal Repeller (2-Pack) Protects your yard from unwanted pests like raccoons, skunks, deer, squirrels, mice, stray dogs, rabbits Solar Powered, no need for batteries Has mounting bracket in back for easy mounting to wall or tree and bonus garden stake so it can be placed practically anywhere Built in infrared motion detector Repels animals from 30 feet away, weather resistant, mounts to wall or fence