This Pest Repeller Ultrasonic D129 x 75mm uses frequency shifting techniques, prevent pests from developing immunity. The unit has an output of 140dB that can protect up to 280 square meters. The repeller may be effective against rats, mice, fleas, flies, roaches, and crickets. As well as water bugs, silverfish, ants, moths, spiders and most common pests.

Ultrasound frequencies used are out of the hearing range of humans and most domestic pets, such as dogs, cats, fish and birds, etc. The test function moves the output of the frequency to the audible range. We make no guarantee this device will solve your specific problem, but there are thousands of people who swear by it.