* multi-rate timesharing electric energy measuring; * Data display, cycle display in normal; * Communication interface: RS-485 & infrared interface; * Program and meter reading by hand-held unit, meter can also be read by cycle display; * 4 tariff, 10 time-periods; * It may automatically calculate leap years and leap months and display time; * Password protection- 4byte digit password is required when you want to program; * The meter allows clock calibration; * General events record function.