Volt Amp Meter Circuit

DC 0-100V 10A Digital Voltmeter Ammeter Dual Display 10A Voltage Detector Current Meter Panel Amp Volt Gauge 0.28" Red Blue LED Features: Size: 48mm x 29mm x 21mm. Display color: Red & Blue LED (dual display). Display: 0.28" LED digital. Operating voltage: DC 4.5 ~ 30V. Measure voltage: DC 0 ~ 100V. Minimum resolution (V): 0.1V. Refresh rate: ≥500ms / times. Measure accuracy: 1% (± 1 digit). Minimum resolution (A): 0.01A. Operating Current: 20mA. Measure current: 10A (direct measurement, built-in shunt). Operating temperature: -10 to 65°c. Operating Humidity: 10 to 80% (non-condensing). Mounting cutout: 45.5mm x 26.1mm. NOTE: 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 It is unsuitable to use this meter to test current less than 1A ,if you use it to test ampere below 1A,it will have big error.