Power Failure Alarm - Plug into any 110 volt electrical outlet. When there is a power failure, electronic pulsating alarm will go off and red LED light will start flashing. If you have chicks or birds that need looking after when electricity goes off on a cold windy night, plug this unit in your bedroom to wake you. Has a built in 10 - 15 second delay so that short time power outages will not set the alarm off. Ton is 95 decibels at 30 cm.