The Cordless Ultrasonic Pest Controller repels mice, rats, squirrels and other rodents without cords, sprays, fumes or messy clean-ups. Instead, it uses an 88dB ultrasonic "siren" that drives away pests yet cannot be heard by humans, cats, dogs or birds. Once turned on, it emits two one-second ultrasonic bursts every three minutes. The burst frequencies alternate, so rodents cannot acclimate themselves to the sound. For indoor use only (home, garage, barn, shed, etc.), each unit covers 1,500 sq ft. and operates 6 months on a set of batteries. Set includes 2 units.

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