Input voltage:DC 4.5 ~ 30VMeasure voltage: DC 0 ~ 100VMinimum resolution(V): 0.1VMeasure current :  1-10A (no need external shunt)   Minimum resolution(A): 0.01AOperating current: <20mADisplay: three 0.28" LED digital tubeDisplay color: Red 2 digits , Model Dimensions: 48 x 29 x 21mmMounting cutout: 45.5 x 26.1mmRefresh rate: about 500mS / 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 measurementNotice:

The voltage between the thin red and thin black lines must be within DC 4.5-30VThe 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 test current less than 1A ,if you use it to test ampere below 1A,it will have big error