Compared to humans, mice perceive much higher frequencies. Mice communicate with each other in the ultrasonic range, with only fear or anger sounds occasionally audible to humans. This device takes advantage of this characteristic by emitting sound waves in the ultrasonic range. These sounds are inaudible to humans but can be quite bothersome for mice over time, prompting them to seek a quieter spot. The device is battery-operated and can be used in various locations, including outdoors such as barns, garages, or gardens.