alarm function: power failure alarm is mainly used for power failure alarm. 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. dangerous. 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 al that are not detected by failure. Wide compatibility and application voltage: The exqui 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. standby time and durability: failure alarm uses two batteries, ordinary GF22 and rechargeable . 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: failure al are suitable for mon ing computer rooms, power distribution boxes, substations, household electrical wire entrances, etc., and can place stolen electrical wires or appliances."