Alarm function: Primarily used for power line monitoring. If an alarm is connected in parallel with an outdoor cable or meter, the product will immediately notify you if the line is disconnected or the meter is damaged, providing a warning. Stable operability: The automatic charger for power lines can use standard 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 errors. Wide compatibility and application voltage: The power line fault alarm's exquisite design allows this product to be used for a long time under AC175V ~ 265V voltage. The compatible design can be used not only in urban areas but also in suburbs where the voltage is less stable. The humanized design provides you with great convenience. Standby time and durability: The fault alarm uses two batteries, standard GF22 and rechargeable ones. Standard 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: Fault alarms are suitable for monitoring computer rooms, power lines, transformer stations, electrical household wiring entrances, etc., and can detect stolen electrical wires or appliances.