True sine wave output (THD < 3%), Power ON-OFF remote control, Input & output fully isolation, Load control cooling fan, Advanced microprocessor, Output frequency 50/60 switch selectable, Low power saving mode to conserve energy, Input polarity reverse / under voltage / over voltage protections, Output short circuit / overload / over temperature protections, Tri-color indicators display input, output level & failure status, e-13 / CE / FCC approved SKU: APS879