Ammeter Voltmeter Digital DC 0-100V 10A with 2 displays   Features High precision percentage ( ± 1 digit). The ground wire of the test end and the power terminal is the same wire; fast update of about 500 MS / hour. With reverse connection protection. If the positive and negative poles are reversed, the LED ammeter will not be damaged. The 10A voltage and current meter has a built-in shunt. Display voltage and current simultaneously in different colors, red for Volts, GREEN for Amps (the current is measured in the negative guide). The DC voltmeter ammeter has a convenient connection and wide application, for example, it can be applied to the monitoring of accumulators, DC adjustable power supplies or voltage and current change state of other devices.