1、Multi‑functional digital display meter, using rail installation, simple operation and high stability. 2、It can measure AC voltage and current, and calculate active power, reactive power and power factor at the same time. 3、Voltage display 4‑digit red 0.31in LED digital tube, current and time display adopt 5‑digit red 0.31in LED digital tube. 4、Active power, electric energy (electricity) display adopts 5‑digit green 0.31in LED digital tube. 5、With stable performance and high accuracy, it can be used in a variety of occasion that require measurement. 1 x Voltage Current Meter1 x English Manual Item Type: Voltage Current MeterMaterial: ABSWeight: Approx. 132g / 4.7ozProduct Size: Approx. 82x55x65mm / 3.2x 2.2x 2.6inMeasuring Range: AC Voltage: 200-450V, AC Current: 0-100AActive Power: 0-45000WSampling Speed: 2 Times Per SecondElectricity: 0.000-99999kwh, free conversion of decimal pointPower Factor: 1.000- 0.000Time Accumulation: 0.00- 999.59hResolution: When measured current is less than 10A, the current display resolution is 0.01A, when the measured current is greater than 10A, the current display resolution is 0.1A, and the range is automatically convertedDisplay: Voltage display 4-digit red 0.31in LED digital tube, current and time display uses 5-digit red 0.31in LED digital tube, active power, electric energy (electricity) display uses 5-digit green 0.31in LED digital tube