The Bell & Howell Solar Animal Repeller emits a high frequency ultrasonic sound unpleasant to animals. It easily mounts to almost any surface but comes with its own mounting stake so you can place it almost anywhere. Once animals come within range, the built in infrared motion detector activates, both in daylight and even at night, emitting a powerful, ultrasonic sound that sends pests scurrying for safety. It works from up to 30 feet away. It’s weatherproof and solar powered. Rid your yard of unwanted pests such as rabbits, mice, deer, raccoons, skunks, squirrels, and even stray cats & dogs. Humans can’t hear it, but the sound drives pests away and keeps them away for good!