1-20PCS Ultrasonic Pest Killer Repeller. Usually, it could take 3~4 weeks to notice results. Our Ultrasonic Pest Reject is the upgraded version which applies the ultimate ultrasound technology to repel away bugs, mice, cockroaches, rodents, spiders, ants and rats, in doing so driving them away from the vicinity of the sound source,while safe for human and pets.
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