... impedance,Auto,wide range,high reliability, Digital MillivoltmeterDF1945 4 1/2 Millivoltmeters,Intelligent,High speed,High accuracy,High impedance ... 0.05%±51mV10MΩ,30pF200V±0.05%±510mV10MΩ,30pF800V±0.1%±5100mV10MΩ,30pF2.ACV MAX Input:600VACRangeAccuracyResolutionInput impedance40Hz~1kHz1kHz~ ... ±0.8%±20±1.2%±20±2%±2010mV10MΩ,30pF800V±0. 5%±2040Hz~400Hz100mV10MΩ,30pF DF1945 4 1/2 Digital Millivoltmeter