Wowoone LED Digital Voltmeter Ammeter, Mini DC Digital Multimeter 100V 10A, Blue Red LED Amp Dual Digital display Volt Meter Gauge, Car Current Monitor Tester 0.28"(2pcs)

Parameter of Amp Meter Working Voltage of Meter: DC 4.5 - 30V Working current of Meter: 20mA Voltage Measuring Range: DC 0 - 100V Voltage resolution (V): 0.1V Current resolution (A): 0.01A Current Measuring Range: DC 0 - 10A Display: 0.28"" LED digital tube Two Colors Display: Blue and Red Dimensions:48 x 29 x 21mm Mounting Cutout:45.5 x 26.5mm Measure Accuracy: 1% ( 1 digit) Refresh Rate: about 500mS / times Operation Temp: -10-+65 Operating Temperature: -10 to 65ºc Operating Humidity: 10 to 80% (non-condensing) Working pressure: 80 to 106 kPa 0.28" Digital Voltmeter Ammeter The Thick Wire Is Connected In Series Between The Negative Poles, The Thick Black Wire Is Connected To The Negative Pole Of The Power Supply To Be Tested, The Thick Red Wire Is Connected To The Negative Pole Of The Load, And Cannot Be Reversed, And The Yellow Wire Is Connected To The Positive Pole Of The Measured Power Supply. Digital Voltmeter Display The Thin Red Wire Is Connected To The Power Supply. The Power Supply Cannot Exceed 30v. Volt Meter Display The voltage between the thin red and thin black lines must be within DC 4.5-30V The ammeter can only be connected to the negative of the device under test Precautions for Dc Amp Meter When the black thin line vacant, it is better to use insulating tape around the exposed part of the wire, to prevent short circuits If 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 flashing Integrated Shunt could use it direc