This meter is a high-performance, automatic range digital automotive multimeter. It has multimeter measurement functions such as AC and DC voltage, AC and DC current, resistance, diode, circuit on and off, capacitance, frequency, duty factor, Celsius/Fahrenheit temperature, etc. The meter can also be used to measure automobile engine speed, closing angle, injector injection time, oxygen sensor testing, fault code detection, automobile generator testing and other functions. With large-screen full-function display, full-range overload protection, etc., it is a multi-purpose measuring instrument with superior performance and an ideal measuring tool for car drivers and maintenance personnel. specifications use Used to measure AC and DC voltage, AC and DC current, resistance, on-off, diode, capacitor and frequency size 13cm*7.5cm*3.7cm weight 0.125kg color Black + Blue material ABS operating altitude 0 to 2000 meters IP rating IP20 sampling rate About 3 times/second maximum display 3999 counts (3 ½ bits) range selection automatic range use environment Temperature: 0℃~40℃, relative humidity: <75% additional temperature coefficient 0.2x specified accuracy/℃ (<18℃ or>28℃) storage environment Temperature: -10℃~50℃, relative humidity: <85% battery 1.5V AAA battery, 2 pcs.