Remote watt-hour meter reading system:Characteristic: Multi-tariff available based on inner RTC clock. Data and informations shown by LCD screen. Precision measurement, no needs correctting after a long working period. Anti-fraud by accounting the reverse electrical current in arrear. AMR system and on-off control through M-bus communication. Power will be cutted off when it reach the max power prescribed Data can be retained over 10 years after power off.