A quick and simple way to monitor the battery voltage in a vehicle, this voltmeter simultaneously displays the voltage numerically and on a bar graph. Simply wire it up to a DC power source between 5-15VDC, and the blue LED voltmeter will show the voltage. The colour-coded LED bar graph indicates the voltage level on a scale from 11.3 to 13.2 volts, which is optimal for vehicle battery condition.
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