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 sound an alert if the wire is disconnected or the meter is damaged, offering a timely warning. 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 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. This makes it suitable for use in both 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 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. Helps detect unauthorized disconnection of electrical wiring or equipment.