These two are panel meters of different sizes, also called embedded meters; It is mostly used for energy measurement on the distribution cabinet. It can measure voltage, current, power factor, active/reactive power, active/reactive electricity, demand, harmonics, etc. Three-phase panel meter, voltage 3*220/380V, current 3(6)A CT type, accuracy class 0.5. RS485 communication Modbus protocol, using dot matrix LCD.