Produces a sound that is very unpleasant to cats, dogs, and even raccoons but inaudible to the human ear- Switches off automatically when the animal has left the area for extended battery life- Easy to install- Weather resistant- Powered by 6AA batteries or 9VDC adapter not included- Built in test button and LED indicator- Patented design – Area Covered: Up to 295 square feet – Audio Frequency: 18kHz-24kHz with up to 90dB volume