1. Unlike other alarms on the market, this product features both a power outage alarm and a call alarm, making it a dual-function alarm. 2. The power outage alarm, also known as a computer room power outage alarm, will immediately sound an alarm when the power grid is interrupted or the power line is cut, continuing until power is restored or the battery is depleted. 3. Compatible with computer rooms, power control rooms, power companies, and other similar locations, it can also be used in residences as a burglar alarm in case of stolen wires or cables. 4. The power indicator light clearly shows the power grid status; it is designed to withstand high voltage, allowing it to operate for extended periods at 260V, even at night when the mains voltage exceeds the limit. 5. The drawer-type battery cover is easy to open and close, and battery replacement is very convenient; it can use ordinary batteries. Product Features: This product differs from other alarms on the market by featuring both a power outage alarm and a call alarm function, making it a dual-function alarm. The power outage alarm, also known as a computer room power outage alarm, will immediately sound an alarm when the power grid is interrupted or the power line is cut, continuing until power is restored or the battery is depleted. Compatible with computer rooms, power control rooms, power companies, and other locations, and can also be used in residences as a burglar alarm when electrical wires and cables are stolen. The drawer-type battery cover switch is convenient, and battery replacement is simple; ordinary batteries are usable. Specifications: Status: Material: ABS Color: White Package Weight: Approx. 100g/oz Alarm Mode: A whistle will sound when the mains power is lost or the power cord is disconnected, until power is restored. Alarm Volume ≥ 115 dB. Power Indicator: Mains power status is clearly visible. Battery Life: ≤ 2 years in standby mode with ordinary batteries. Battery Replacement: Drawer-type battery cover switch for easy replacement. Operating Environment: Temperature -30℃～+60℃. Relative Humidity ≤ 85% RH. Package List: 1 * Power Failure Alarm Sensor (battery not included)