Main Function 1. Displaying and recording the total power and the peak, shoulder, flat and valley of present month and last month. 2. Recording and displaying reversed power. 3. Displaying and recording the total power. 4. Recording the time and date, which can be check, if necessary. 5. Displaying the charge-rate time interval of the real time. 6. Presetting accumulation of the total quantity of electricity, date, time constant of meter date of meter copying and parameter of time interval. 7. Impulse signal output and battery under voltage can be warned.