Sharp alarm function: The power failure alarm is designed to provide immediate notification in case of power interruption. When connected in parallel with an outdoor wire or meter, the device will trigger an alert if the wire is disconnected or the meter is damaged, offering timely warning protection. 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 designed to operate reliably within an AC voltage range of 175V to 265V. Its compatible design allows use in both urban and suburban areas, including locations with unstable voltage supply. Long standby time and durability: The device uses two batteries—standard and rechargeable types. Standard batteries last approximately 2 years, while rechargeable batteries offer extended service life and can be recharged for up to 10 years of use. Wide range of applications: Suitable for monitoring computer rooms, electrical distribution boxes, substations, and household electrical entry points. Helps detect unauthorized disconnection of electrical wiring or equipment.