Sharp alarm function: The power failure alarm is designed to provide immediate notification in the event of a power interruption. When connected in parallel with an outdoor wire or meter, the device will sound an alert if the connection is broken or the meter is damaged, offering a warning for potential issues. Excellent stable performance: The automatic charging system supports both standard and rechargeable batteries. When using rechargeable batteries, the standby life can last up to 10 years, helping to prevent false alarms caused by battery failure. Wide compatibility and operating voltage: The power failure alarm is engineered to operate reliably within an AC voltage range of 175V to 265V. This design allows consistent performance in various environments, including urban and suburban areas where voltage fluctuations may occur. Long standby time and durability: The device uses two batteries—compatible with standard and rechargeable types. Standard batteries provide approximately 2 years of operation, while rechargeable batteries offer extended service life and can be recharged for continued use over a long period. Wide range of applications: Suitable for monitoring computer rooms, electrical distribution boxes, substations, and household electrical entry points, this alarm helps detect unauthorized disconnections of wiring or electrical theft.