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 alert you if the circuit is broken or the meter is damaged, offering a reliable warning system.Excellent stable performance: The automatic charging circuit supports 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 engineered to operate reliably within an AC voltage range of 175V to 265V. Its compatible design ensures stable performance not only in urban areas but also in suburban regions with fluctuating voltage.Long standby time and durability: This alarm uses two batteriesstandard AA batteries or rechargeable options. 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 power entry points, this alarm helps detect unauthorized disconnections of electrical wiring or equipment.