Sharp alarm function: Power failure alarm is mainly used for power failure alarm. When an alarm is connected in parallel with an outdoor wire or meter, the product will immediately report to you if the wire is disconnected or the meter is damaged, providing a warning alert. Excellent 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, which can prevent false alarms that are not detected by battery failure. Wide compatibility and application voltage: The exquisite design of the power failure alarm makes this product can be used for a long time under AC175V ~ 265V voltage. Compatible design can be used not only in urban areas, but also in suburbs where the voltage is less stable. The humanized design brings you great convenience. Long standby time and durability: Power failure alarm uses two batteries, ordinary GF22 battery and rechargeable battery. Ordinary batteries can be used for about 2 years, while rechargeable batteries can be used for a long time. Rechargeable batteries can be recycled for about 10 years. Wide range of applications: Power failure alarms are suitable for monitoring computer rooms, power distribution boxes, substations, household electrical wire entrances, etc.