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0.28 Inch Dual Display Red Blue LED Panel Voltmeter 4.5-30V Digital Volt Meter Ammeter 1-100A
Specifications: Working current: <60mA Display mode:0.28' LED double colors(Red,Blue) Dimension:48x29x21mm Installation hole size:45.5x26.5mm Measured rate:500mS per time Measuring accuracy: 1% Minimum working voltage: +4.5V Max working voltage: +30V Operating temperature: -10 to +65 Operating humidity:10% to 80% Operating pressure:80kPa to 106kPa Testing voltage:0-100V Supply voltage range:DC 4.5-30V Wire lead length:20cm Current range:1A,2A,5A,10A,50A,100A Onboard Wire Instructions: Thin Red Wire (VCC): positive pole of power supply input (3.5-30V) (Note: if the measuring signal is less than 30V and the power is adequate, can be the power supply of module) Thin Black Wire (GND): negative pole of power supply input (3.5-30V, common ground with measuring signal) Thick Red Wire (VIN): positive pole of measuring signal input (0-100V) Thick Green Wire (I+): positive pole of current input (series connect on the power supply cathode) Thick Black Wire (I-): negative pole of current input (series connect on the power supply cathode) Package included: 1 x Dual LED panel ampere voltage meter Direct power supply wiring: http://files.banggood.com/2018/04/Direct-power-supply.jpg Independent power supply wiring: http://files.banggood.com/2018/04/Independent-power-supply.jpg