The meter is high resolution( 1μV). Half and 4 digit DC digital voltmeter. It adopt large-scale integrated A/D diversion and low noise op. amplifier op07, the meter features high precision and reliability. Ease of use the whole meter adopt DC-DC converters power supply. It features high anti-interfere capability. It is widely used in factory, laboratory and scientific research unit as middle precision and large range voltage measurement, also as second meter of sensors.