Mini Digital Voltmeter Ammeter DC 0-100V/ 7-110V 50A Amp Volt Voltage Current Meter Detector Tester 0.28" Dual LED Display Gauge [DC 0 -100V 0 -50A Voltage Current Meter] 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 0-50A Voltage resolution (V): 0.1V Current resolution (A): 0.01A Measure accuracy: 1% ( 1 digit) Display: 0.28" digital tube, Two color blue and red Refresh rate: about 300mS / times Dimensions: 48mm*29mm*26mm Operation Temp: -10 -65C [50A 75mV Shunt] Specification: Product Name: DC Shunt Model: FL-2 Material: Metal, Plastic Accuracy: 0.5 Cla Current: 50A Voltage Drop: 75mV [Newest DC 7 -110V 0 -50A Voltage Current Meter] Specification: Working voltage: DC 7 -110V (recommended 5 -12V) Current measurement range: DC 0.0A -50.0A(display mode 0.0A -10.0A -50.0A) Voltage measurement range: DC 7 -110V (display mode 0.0V -10.0V -110V) Refresh speed: 300ms/time Display Size: 0.28 inch 3-digit LED Display Color: Red/Red, Blue/Red (Optional) Reverse connection protection: there is reverse connection protection of working power supply, but long time reverse connection may also cause damage Product size: 46.7528.8222.20mm Hole size: 45.526.0mm Operation Temperature: -10 -65C [50A 75mV Shunt] Specification: Product Name: DC Shunt Model: FL-2 Material: Metal, Plastic Accuracy: 0.5 Cla Current: 50A Voltage Drop: 75mV Product wire: 4 wires (2P thin wire, 2P thick wire) Lead definition: Thin red line: positive pole of instrument power supply and positive pole of voltage measurement Thin black wire: the negative pole of the power supply of the instrument and the negative pole of the voltage measurement Thick red line: the positive pole of the current test, in series with the negative pole of the load Thick black wire: negative pole of current test, connected to negative pole of load power supply Note: DC 7 -110V can be measured directly, no independent power supply is required, and wiring is convenient. The product withstand voltage is 150V. If the voltage exceeds 110V, the digital tube will be turned off. If the voltage exceeds 150V, including pulse voltage, the meter will be completely damaged.