Features: Electrical parameters measurement: AC voltage, current, active power, frequency, power factor, electrical energy;six in one. Power 0 clearing mode: key 0 clearing, automatic 0 clearing. Display type: LCD display, blue back;One screen multi-display, "7 kinds of display modes" is optional. Blue backlight brightness adjustable: high light, low light, not bright. The built-in button of the watch head can calibrate the voltage, current error and other options by itself. Display value update speed optional: fast, standard, slow, suitable for different working environment. Display accuracy can be set:3-bit,4-bit;Applicable to different requirements, power-down data storage function. The AC voltage, current, power and electric energy are all designed by automatic shift of decimal point. Instrument with a back cover, more safe to use, more convenient, more secure. Simple connection of instrument: no need to connect the power supply.Current testing requires no additional purchase of transformer or shunt. Specification: Wroking Temperature:-10~50 Working Humidity:10~80% Working Air Pressure:80~106kPa No Direct Sunlight Package List: 1*Multi-funtion Meter Note: 1.As different computers display colors differently, the color of the actual item may vary slightly from the above images. 2.The middle two terminals are the input and the left and right terminals are the output. 3.Do not use when there is high frequency voltage.