15000hz, 17500hz & - 20000hz Ultrasonic Ultimate Extreme Mouse And Rat Repellent (11 1 2 Hours)

The audio includes a "ticking" sound every second as the frequencies switch, which is intended to prevent rodents from habituating (getting used) to a single tone.

These are technically "high-frequency" rather than ultrasonic (which begins at 20kHz). Younger humans with sensitive hearing may find these frequencies highly irritating or even painful. The audio includes a "ticking" sound every second

At 11.5 hours , the track is meant to run overnight or during work hours to provide continuous coverage. Critical Limitations and Science The audio includes a "ticking" sound every second

This is the threshold of ultrasound, generally inaudible to most adults but well within the hearing range of mice and rats. The audio includes a "ticking" sound every second