Measure Vrms, lrms, W, PF, Hz;Harmonic distortion analysis for voltage & current, display total harmonic and 0-50 times;Component harmonic, selectable for absolutely or relatively harmonic display;Voltage range:10.0-600.0V, Current range:0.010-20.00A, Auto range;Accuracy: (0.4%reading + 0.1%range + 1digit);Simultaneously display Vrms, lrms, W, PF value on 4 windows, suitable for production line;Can test every kinds of curve; Print both data & curve;Communication port for PC, run under WinXP or Win7.