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Description:Working voltage of Meter itself:DC 4 - 30V(The maximum input voltage can not exceed 30V. Otherwise the meter will be burned)Working current of Meter itself:≤20mAVoltage Measuring range: DC 0 - 100VCurrent Measuring range: DC 0 - 10AVoltage resolution (V): 0.1VCurrent resolution (A): 0.01AMeasure accuracy: 1% (± 1 digit)Display: 0.28" digital tube, Two color Refresh rate: about 300mS / timesDimensions:48mm*29mm*26mmOperation Temp: -10℃-+65℃ Package Included:3pcs DC 100V 10A Voltmeter & Ammeter