Description DC 100V 10A 50A 100A Digital Voltmeter Ammeter Wattmeter Voltage Current Power Meter Volt Detector Tester Monitor Voltage Tester Features: Voltage measurement range: 0.0V-100V Current test range: 0-999mA, 0-10A Power supply range: DC4-30.0V Voltage error: 0.1% Current error: 1% Working current: 20mA Refresh rate: about 300mS once Display mode: double three-digit 0.28 LED digital tube Display colors: red+blue Lead length: 15cm Dimensions: 48 x 29 x 22 mm Mounting hole: 46 x 27 mm Working temperature: -10~65 Specification: 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:20mA Voltage Measuring range: DC 0 - 100V Current Measuring range: DC 0 - 10A,0-50A,0-100A Voltage resolution (V): 0.1V Current resolution (A): 0.01A Measure accuracy: 1% ( 1 digit) Display: 0.28 digital tube Refresh rate: about 300mS / times Dimensions:48mm*29mm*26mm Operation Temp: -10-+65 0-10A built-in shunt 0-50A0-100A do not include shunt.