Features:  1. Six-in-one electrical parameter measurement: AC voltage, current, active power, frequency, power factor, electrical energy.  2. Power clear mode: press key to clear, automatically clear.  3. Display type: LCD display, blue backlight: one screen multi-display, a total of 7 display modes are available.  4. Blue backlight brightness adjustable: highlight, low light, no light.  5. The button inside the meter can calibrate the voltage, current error and other options.  6. Display value update speed is optional: fast, standard, slow, suitable for different working environments.  7. Display accuracy can be set: 3 digits, 4 digits: different requirements apply.  8. Power-down data saving function.  9. AC voltage, current, power and electric energy are all designed by automatic shift of decimal point.  10. Simple wiring of the instrument: two wires in, two wires out: no need to connect additional power supply; current test does not need to purchase additional transformer or shunt, built-in high-precision shunt.  11. Dimensions: 79*43*26mm.  12. Installation opening size: 76*39.5mm.   Specification:  Voltage: AC60-500V, AC 60.00-500.0 V, 100V: 0.1V, Automatic decimal shift.  Accuracy: 0.5% +/- 2 words.  Current: AC20A (direct test), AC 0.000-20.00 A, 10A: 0.01A.  AC100A (instrument inner hole 16mm), AC 0.020-99.99 A, 10A: 0.01A.  AC200A (instrument inner hole 26mm), AC 0.04-200.0 A, 100A: 0.1A.  Active power: 00.0-9999 KW, 00.0-999.9W: 0.1W.  1000-9999W: 1W.  010.0 KW-999.9KW: 0.1KW.  >1000KW resolution is: 1KW, Automatic decimal shift.  Frequency: 45.00-65.00 Hz, 0.01 Hz.  Power factor: 0.000-1.000, 0.001.  Electric energy: 0.000-9999 KWh, 0.000-9.999 KWh: 0.001KWh.  10.00-99.99 KWh: 0.01KWh.  100.0 KWh - 999.9 KWh: 0.1KWh.  >1000 KWh: 1KW, Automatic decimal shift.     Extreme working conditions:  Working temperature: -10 ~ +50 ° C.  Working humidity: 10~80% (no condensation).  Working pressure: 80 ~ 106kPa.  Sunlight: no direct illumination.     Package includes:  1 x Meter