If I can’t hear the DX610, how do I know if it’s still working?

This is great question. “If I can’t hear the DX610, how do I know if it’s still working”

The DX610 has a small red LED indicator that glows when the unit is plugged in. There is also a soft pulse sound you can hear if you are close to the unit. You will also notice an absence of mice, rats.