This digital multi-function meter simultaneously measures and displays 6 parameters: AC voltage, AC current, active power, power factor, frequency, and electrical energy. The instrument's display uses a colorful, high-resolution LCD screen. Specification: Measurement accuracy: 1% ± 2 digits AC current: AC 0-99.99A, current display resolution is 0.01A; when it exceeds 100A, it will display 100.0A Frequency: 45.0Hz-65.0Hz Power factor: 0.00-1.00PF Active power: measurement range is 0-45000W, display resolution between 0-9999.9W is 0.1W, and the rest is 1W Electricity: Measurement range is 0-99999kwh, the minimum display resolution of 0-999.99kwh is 0.01kwh; 10000.0-9999.9kwh, the minimum display resolution is 0.1kwh; The minimum resolution of 10000.0-99999kwh is 1kwh Measuring rate: about 2 times per second Hole size: diameter 22mm Save function/memory function: automatic save function: when the power is off, the meter will automatically save the current energy value, and the meter will read the value after the power is turned on and continue to accumulate. AC: AC 250-450V Material: plastic Color: White Package Contents: 1 x meter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The allowable measurement error is +/- 1-3cm.