... is a kind of new style single phase electronic multi-rate watt-hour meter, energy data display adopt 7 digits wide ... temperature type crystal display, with many functions of multi-rate (time-of use) energy measurement, infrared carrier wave communication and ... .2.Six pole width (Modulus 12.5mm), complying with standard JB/T7121-1993.3.Have two tariffs, and port of set ...