uxcell Mini Measuring DC 0-20V Analog Volt Voltage Panel Meter Pointer Voltmeter This meter is used for current testing.Uses in autos, marine,solar, wind, hydro power system etc. Voltage indications and monitoring electrical systems.High accuracy, low power consumption. Easy to test current.And panel mounting is easy to install. Use it with a 75mV shunt resistance to connect with the electronic instrument. It also be used for other products voltage measurement purposes.