Features:_x000D_ _x000D_ Electrical parameters measurement: AC voltage, current, active power, frequency, power factor, electrical energy;six in one. _x000D_ Power zero-clearing mode: key zero-clearing, automatic zero-clearing. _x000D_ Display type: LCD display, blue back;One screen multi-display, "7 kinds of display modes" is optional. _x000D_ Blue backlight brightness adjustable: high light, low light, not bright. _x000D_ The built-in button of the watch head can calibrate the voltage, current error and other options by itself. _x000D_ Display value update speed optional: fast, standard, slow, suitable for different working environment. _x000D_ Display accuracy can be set:3-bit,4-bit;Applicable to different requirements, power-down data storage function. _x000D_ The AC voltage, current, power and electric energy are all designed by automatic shift of decimal point. _x000D_ Instrument with a back cover, more safe to use, more convenient, more secure. _x000D_ Simple connection of instrument: no need to connect the power supply.Current testing requires no additional purchase of transformer or shunt. _x000D_ _x000D_ Specification:_x000D_ Wroking Temperature:-10~50_x000D_ Working Humidity:10~80%_x000D_ Working Air Pressure:80~106kPa_x000D_ No Direct Sunlight_x000D_ _x000D_ Package List:_x000D_ 1*Multi-funtion Meter_x000D_ _x000D_ Note:_x000D_ 1.As different computers display colors differently, the color of the actual item may vary slightly from the above images._x000D_ 2.The middle two terminals are the input and the left and right terminals are the output._x000D_ 3.Do not use when there is high frequency voltage._x000D_ _x000D_ Manual:_x000D_ Mode Button:For each click, switch the display mode of the variable display area:_x000D_ Only show frequency Hz _ only show power factor PF _ only show power kWh-power factor PF, frequency Hz cycle display-power factor PF, power kWh cycle display-frequency Hz, power kWh frequency Hz, power factor PF, power KWh _ cycle length according Hold the button to enter the setting mode or confirm exit._x000D_ Set Button:For each click, switch the brightness of a backlight: highlight, low light, no light setting mode, _x000D_ Each click, the number adds one or switch the corresponding option_x000D_ Long press cancel settings or exit._x000D_ Main Menu Setting Option _x000D_ 1-CU Calibrate Voltage Error _x000D_ 2-CA Calibrate Current Error _x000D_ 3-SP Setting Refresh Rate F:Quick S:Standard L:Low _x000D_ 4-En Power Setting Acc:Continous Automatic Adding Up REA: Power off and power on, when the output connected to the load and generated electricity, the electric energy flash zero and re-accumulation;If there is no load, do not clear the zero CLE: Manual power clearing _x000D_ F-dS Display Digit Setting 3:Voltage Current Frequency Power Factor 3 Digits 4:Voltage Current Frequency Power Factor 4 Digits _x000D_ H-rS Recovery of ex-factory value N:No operation Y:All settings restored to factory value