Check the listing for details. DC 0-100V 1A 10A 50A 100A Digital Voltmeter Ammeter LED Display Amp Volt Meter. Condition: New. Listed at 3.39 USD. Digital Voltmeter Ammeter LED Display Amp Volt Meter Attention For meters with a shunt, the two red wires on the meter head must be connected to the thin screw of the shunt, and the negative pole of the power supply and the negative pole of the load must be connected to the thick screw of the shunt. Technical parameters of voltmeter Working voltage: DC4.5-30VTest voltage: DC0-100VWorking current: ≤ 20MAMeasurement rate: ≥ 300mS/timeInstallation hole: 45.5X26.5mmMeasurement accuracy: ± 1%Low operating voltage: +4.5VMaximum working voltage: +30VThe maximum test current range: 10AMinimum resolution: 10MAWorking temperature: -15℃+70℃ External dimensions 48x29x21mm (length x width x height)Working pressure: 80-106kPa Technical parameters of ammeter（If other technical parameters of the ammeter are not separately marked, they are the same as the technical parameters of the voltmeter） Ammeter range: 1~9.99AWorking current: