DDSF3666-type single-phase electronic multi-rate watt-hour meter, My latest developed with a 7-bit wide temperature type LCD display, multi-rate (hourly) energy measurement, infrared carrier wave communication and RS485 serial communication interface meter / set the table a variety of functions such as intelligent as one full-Electronic Energy Meter. Performance of the table in full compliance with the Ministry of standard DL/T645-1997 and GB GB/T17215.321-2008 in 1 or 2 single phase energy meter-related technical requirements, with good reliability, small size, light weight, beautiful appearance, the installation flexibility and so on.