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 trigger an alert if the wire is disconnected or the meter is damaged, offering timely warning protection. Excellent stable performance: The power failure alarm features an automatic charging system compatible with both standard and rechargeable batteries. When using 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 power failure alarm is designed to operate reliably within an AC voltage range of 175V to 265V. This wide voltage tolerance allows consistent performance in various environments, including urban and suburban areas where voltage fluctuations may occur. The user-friendly design ensures long-term reliability and convenience. Long standby time and durability: The device uses two batteries—standard GF23 batteries or rechargeable batteries. Standard batteries last approximately 2 years, while rechargeable batteries can be used for extended periods and offer a service life of around 10 years with proper maintenance. Wide range of applications: Suitable for monitoring computer rooms, electrical distribution boxes, substations, and household power entry points, this alarm helps detect unauthorized disconnections of electrical wiring or equipment.