PF9816s is a multifunctional and economical single phase AC, DC digital power meter with level 0.2 power measurement accuracy, which can realize measurement of DC, 0.5Hz-10kHz and minimum 25μA current. In addition to the measurement of basic electrical parameters, it also has the functions of harmonic measurement, electric energy integration, wave filtering and so on. Equipped with special software, it can quickly set measurement parameters, display, store and transfer measurement data, and display voltage, current waveform and harmonic spectrum.