Features: 1AC voltage current meter, with LCD display, can clearly display the voltage and current values. 2Voltage measurement range is 40?400V, and the current measurement range is 0?100A. 3With high measurement accuracy, and the measurement accuracy of voltage and current is 1%. 4Product has been calibrated before shipped out, and the error can also be adjusted manually, simple operation. 5With orange backlight function, short key can turn on or off backlight, suitable for dim environments. Condition: 100% Brand New Item Type: Voltage Current Meter Material: ABS Display Instructions: Voltage: Measuring Range: 40-400V Display Format: 100V Display, Such as: 80.0V 100V Display, Such as: 220V Accuracy: 1% Ampere: Measuring Range: 0-100A Display Format: 10A Display, Such as: 1.00A 100A Display, Such as: 10.0A 100A Display, Such as: 100A Initial Measurement: 0.02A Accuracy: 1% Backlight Controling: Short button can turn on or off the backlight Weight: Approx. 95g / 3.4oz Error Adjustment: The product has been calibrated before leaving the factory, and the user can manually adjust the error, the method is as follows: Step 1: Long press the button (about 3 seconds) until the screen number flashes, then release the button Step 2: The number flashing means entering the error adjustment state, the number cycle flashes in sequence: voltage high voltage middle voltage low voltage decimal point ampere high ampere median ampere low ampere decimal point. Flashing represents the current adjustable number, short press this key to adjust the value (number 0-9 cycle, decimal point shift) Step 3: Long press the adjusted button (about 3 seconds), the screen displays Pass and returns to the normal display interface, indicating that the adjustment is successful Package included:1 x AC Voltage Current Meter