When you are brooding or incubating eggs the last thing you want is a power outage. Plug this power failure alarm into any 110 volt electrical outlet, and when there is a power failure, an electronic pulsating alarm will sound and a red LED light will flash. The unit has a built in 10 second delay, so a short power interruption will not set the alarm off. The alarm will continue to sound until the reset button is pressed or power returns. If incubating eggs or brooding chicks, we recommend plugging this unit in your bedroom at night to wake you when the electricity goes off.