【6 Measurement Functions】: One interface simultaneously displays 6 measurement parameters, including voltage (AC 80-260V), current (0-100A), power (0-22000W), energy consumption (0-999kWh), frequency (45-65 Hz), and power factor (0-1PF). 【Backlight Control】: The backlight can be turned on or off by short pressing the button, and data can be automatically saved when the backlight is off. 【Alarm Function】: You can set a power alarm threshold. When the backlight flashes, it means the current power exceeds the overload power, warning of overload. The alarm stops when the current power is lower than the overload power. A battery alarm threshold can also be preset. 【Power Reset Function】: Step 1: Press and hold the button for 5 seconds until the power number flashes, then release the button. Step 2: Briefly press the button again to clear battery data and exit the flashing mode. Step 3: If there is no key operation within 5 seconds, the performance data will not be cleared, and it will exit the reset mode. 【Wide Application】: Widely used in household appliances, solar power systems, industrial assembly lines, etc.