... , such as AC DC voltage/ampere/power/power factor/frequency/electrical degree/reactive power/power frequency, etc; can act as phase ... range:0-360°, display phase angle and input amplitude,mini power is 1mW,apply to energy-saving equipment, production line ... parameters:under- voltage/under-ampere/over voltage/over ampere/power/power factors selectable,analog output 4-20mA.4) Communication:RS485 ...