parameters: Operating voltage: DC 4.5 ~ 30V Measure the voltage: DC 0 ~ 100V Minimum resolution (V): 0.1V(when >10V) Minimum resolution (V):0.01V(when Measure current: 2A / 5A / 10A / 50A / 100A (> 10A, need external shunt) Minimum resolution (A): 0.01 A Operating Current: Display: three 0.28 "LED digital tube Display Color: Red + Red; Red + Blue (Dual Display) Dimensions: 48 x 29 x 21 mm Refresh rate: 500 ms / times Measuring accuracy: 1% (± 1 digit) Operating temperature: -10 - 65 ℃ Humidity: 10 to 80% (non-condensing) Working pressure: 80 to 106 kPa wiring: Black line (thin): vacant or buck circuit (module) is negative Red line (thin): Power Supply + Black line (thick): COM, common measurement Red line (thick): PW +, measuring terminal voltage input positive Yellow line (thick): IN + input + current Please note: The operating voltage must be DC 4.5-30V. The ammeter can be connected only to the negative of the device. ≤10A, built-in shunt, no need external shunt; > 10A, need external shunt. When the black thin line free, it is better to use insulating tape around the exposed portion of the wire to prevent short circuits If only be used as a voltmeter, connect together the yellow and black line. Package Included: 1x digital amp volt meter
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