... Factor Meter Accuracy: Class 2.5 Amp.: 1A or 5A Volt.: 1 Phase:110V-440V,3 Phase:110V-600V..... Square Type Moving Coil ... .2. Accuracy: Class 2.53. Voltage:1) Single Phase:110V, 220V, 380V, 440V.2) Three Phase:110V, 220V, 380V, 440V, 500V, 600V.4 ...