Measure input parameters: Vrms, lrms, W, PF, Hz, current crest factor, total harmonic and 050th harmonic components. V range: 10.0300.0V, A range: 0.0102.000A, f range: 4565HzMeasure output parameters: Vrms, lrms, W, PF, Hz, current crest factor, total harmonic and 050th harmonic components Lamp voltage range: 10.0450.0V, Lamp current range: 0.0102.000AAccuracy: (0.4% reading+0.1% range+1 digit)Can test every kind of curve, print both data & curveCommunication interface available for PC, running under Windows982000XPVista