【LED Indicator & 110dB】: Power Failure Alarm will inform you of power problem through LED flashing and 110dB loud siren. When you connect power outage notification device to a high-power electrical appliance with a breaker in circuit, if the breaker switch trips, freezer alarm makes a one-to-one targeted alarm to remind you to troubleshoot circuit problems and rescue related property and equipment 【7 Siren Adjustment】: Designed with 7 sirens & volume up to 110dB for freezer alarm, 7 sirens including sharp, soft, piano and other ringtone to choose from. Choose the appropriate ringtone and volume based on distance or the requirements of different usage scenarios. Power failure alarm can be installed in the living room, garage, full protection for home security 【Circuit Abnormality Alarm】: When the circuit is open or short-circuited cause the electrical appliance losing power, the power failure alarm will issue an alarm; When the voltage is normal, the LED light on the freezer alarm will