The small size of the two-color dual instrument.Voltage and current can be displayed on the same screen at the same time.The the instrument test voltage supply range: DC4.5 ~ 30V， the reverse does not burn.Note: The maximum input voltage can not exceed 30V， otherwise there is the danger of burned Technical parameters:Supply voltage: 4.5 ~30V (wide range)Test voltage: 0 ~ 100V; minimum resolution: 0.1VTest current range: 100A resolution: 0.1AOperating Current: <20mADisplay: 0.28 "LED， two-color(red and blue)Dimensions: 47.5 × 28.5 × 21 mmMounting cutout: 45.5 × 26.5 mmMeasurement rate: ≥ 100mS / timesMeasurement accuracy: 1% (± 1 words)Extreme working conditions: 1.The minimum Operating voltage: +4.5 V 2.Maximum working voltage: +30 V 3.Operating temperature: -15 to +70 4.Operating Humidity: 10 to 80% (non-condensing) 5.Working pressure: 80 ~ 106kPa 6.Sun exposure: no direct exposure Note: shunts is not includingAbout wiring:Red line thin: power supply+Black line thin: power supply -Blue line (thick): PW+， measuring terminal voltage input positiveYellow line (thick): IN+， current inputGreen line thick: COM， common measuring