Feature:1. Measure AC Voltage: Measure AC voltage, current, active power, electricity and display on the LCD screen.2. LCD Screen Display: This AC digital display adopts LCD screen display, which is more intuitive and clear at a glance.3. Backlight Controls: With backlight controls, the backlight can be turned on or off freely by pressing the button shortly.4. Power Reset: Press and hold the button for more than 3s until the battery flashes, release the button and short press again to reset the battery, otherwise the flashing will stop after 3s and the battery will not reset.5. Data Storage: This multi function digital meter has data storage function, which can be saved in the state of power failure and backlight.Specification:Item Type: AC Digital Display MeterMaterial: ABSModel: SDM0081. VoltageMeasuring Range: AC50~300VStarting Voltage: 50V Measuring Accuracy: +/-1%2. CurrentMeasuring Range: 0~100A Starting Current: 0.02A Measuring Accuracy: +/-1%3. Active PowerMeasuring Range: 0~30kW Starting Power: 0.5W Measuring Accuracy: +/-1%4. ElectricityMeasurement Range: 0~1999kWh Overflow and hold, unless manually cleared Measurement Accuracy: +/-1%Installation: Rail Type.Package List:1 x Multi Function Voltage Gauge1 x Power Cord1 x Chinese English User ManualNote:1. Suitable for indoor use2. Suitable for AC3. The measured voltage and current must not exceed the calibration range