Sharp alarm function: Power failure alarm is mainly used for power failure alerts. When connected in parallel with an outdoor wire or meter, the product will report if the wire is disconnected or the meter is disconnected, providing a warning alert.Stable workability: The flow automatic charger of the power failure alarm can use ordinary batteries and rechargeable batteries. When using rechargeable batteries, the standby life can be up to 10 years, helping prevent undetected false alarms.Wide compatibility and application voltage: Designed for long-term use under AC175V ~ 265V voltage. Compatible for use in both urban and suburban areas where voltage is less stable.Long standby time and durability: Uses two batteries, ordinary GF22 battery and rechargeable battery. Ordinary batteries can be used for about 2 years, while rechargeable batteries last longer.Wide range of applications: Suitable for monitoring computer rooms, power distribution boxes, substations, household electrical wire entrances, and preventing stolen electrical wires or appliances.