Emits ultrasonic sound waves which are extremely unpleasant for cockroaches, flies, crickets, silverfish, earwigs, mice and other nasty critters. Laboratory research has shown ultrasonic sound waves attack the auditory and nervous systems of most common pests causing them pain and discomfort. The high intensity sound waves will end up driving away these pests. The frequency can be manually adjustable from 22kHz up to 49kHz, for driving away certain pests. A clean alternative to using poison or dangerous traps. Includes mains power supply.