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Do ultrasonic pest repellents work?Insects: Some ultrasonic repellents also work on insects ... The sound waves do not penetrate walls, making it necessary to use multiple units such as a 6-Pack Ultrasonic Pest Repeller from ...
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House Digest on MSNDo Ultrasonic Bird Repellents Actually Work?Pigeons, robins, and other pest birds ... scenario, ultrasonic bird repellents may deter stray dogs, cats, rabbits, mice, ...
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