Bell + Howell 50107 Motion Activated Ultrasonic Battery Powered Animal Repeller Protects your yard from unwanted pests like raccoons, skunks, deer, squirrels, mice, stray dogs, rabbits Requires 4 AA batteries (not included) Has mounting bracket in back for easy mounting to wall or tree Built in infrared motion detector Repels animals from 30 feet away, weather resistant, mounts to wall or fence