Sharp alarm function: The power failure alarm is designed to provide immediate notification in the event of a power outage. When connected in parallel with an outdoor wire or meter, the device will alert you if the circuit is interrupted or the meter is damaged, offering timely warning for potential hazards. Excellent stable performance: The power failure alarm supports both standard and rechargeable batteries. With rechargeable batteries, the standby life can last up to 10 years, helping prevent false alarms caused by battery failure. Wide compatibility and operating voltage: The device 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, providing reliable performance and user convenience. Long standby time and durability: The alarm uses two batteriesstandard or rechargeable. 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 home electrical entry points, this alarm helps detect unauthorized disconnection of power lines or tampering with electrical equipment.