Sharp alarm function: The power failure alarm is designed to provide immediate notification when a connected wire is disconnected or a meter is damaged. It delivers a clear warning alert in case of power interruption. 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 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 allows use in urban and suburban areas, including locations with unstable voltage supply. Long standby time and durability: This device operates with two batteries—standard GF23 batteries or rechargeable options. Standard batteries last approximately 2 years, while rechargeable batteries offer extended service life and can be recharged for long-term use. Wide range of applications: Suitable for monitoring computer rooms, electrical distribution boxes, substations, and household electrical entry points. Helps detect unauthorized disconnections or tampering with electrical wiring.