WM-01/02 Power Analyzer Datalogger 1).4 LCD Displays with W, ... Plug-in and Test 3).RS-232 Computer Interface WM-01/02 Power Analyzer Datalogger4 LCD Displays with W, PF, V ... , AC & DC) Range Resolution Accuracy Frequency Overload Protection 20A 0.01 0.5% of rdg ±3 dgts 0-5KHz 20A, fused ...