Description Operating voltage DC 4 30VMeasure voltage DC 0 100VMinimum resolution V 0 1VMeasure current 50A require external shunt Minimum resolution A 0 1AOperating current 20mADisplay three 0 28 LED digital tubeDisplay color Red and Blue two color display Refresh rate about 300mS timesMeasure accuracy 1 1 digit Operating temperature 10 to 65 cOperating Humidity 10 to 80 non condensing Working pressure 80 to 106 kPaApplications Suitable for automotive electric cars motorcycles battery monitoring or other products voltage current measurementWiring Black line thin vacant or buck circuit module negativeRed line thin power supply Black line thick COM common measuringRed line thick PW measuring terminal voltage input positiveYellow line thick IN current input Please refer to the wiring diagrams for more details Notice The voltage between the thin red and thin black lines must be within DC 4 30VThe ammeter can only be connected to the negative of the device under testExceeds 5A long term full load working continuously it is recommended that the measurement side of the leads are directly soldered to the socketWhen the black thin line vacant it is better to use insulating tape around the exposed part of the wire to prevent short circuitsIf just be used as a voltmeter it is recommended that the yellow line and the black line were connected together to prevent the ammeter digital flashingIt is unsuitable to use this meter to tes