Time-sharing metering: Accumulates active electric energy based on time periods and stores total, peak, flat, and valley energy ;Prepayment functionality: Remote electricity sales through RS485/LoRaWAN/NB module, with low-balance alerts and overdraft limit feature ;Measurement and monitoring: Measures, records, and displays parameters (e.g. voltage, current, and power factor with an error margin of ±1%.) ;Timing function: Temperature compensation, automatic calendar, timing, and leap year conversion.