Display: 3 1/2 digits. LED display Accuracy: 0.5% ±2 digits Auxiliary power: AC 110V ± 10% 50/60HZ or 220V± 10% 50/60HZ Input signal: AC current Measuring range: 0-5A AC, for the current over 5A can use the AC current transformer. Consumption: <3VA Operating Environment: temperature 0~40 humidity:≤70% Voltage Testing: over 2000V