The patented DX610, for rodent control, mouse control, mice control,utilizes advanced state of the art technology that works by transmitting a powerful range of ultrasonic sound waves in the 45,000 Hz range. The auto-changing, high intensity frequencies and pulse sequences were designed to output at known auditory sensitivity ranges of pests, like rats, mice. Why aren’t humans effected? Humans can only hear sound up to 20,000 HZ.