What's the difference between single-phase DDS 188 watt-hour meter and smart watt-hour meter in Ningbo Samsung Technology Co., Ltd.?

DDS 188 indicates a single-phase electronic energy meter, and 188 indicates that the meter is Samsung's. If you use an electric meter, this electric meter only has the function of electric energy measurement; If you use LCD, it may take several months to turn off the power, and it may have a switch function. Since 2009, State Grid Corporation of China has put forward the concept of smart meter. Compared with previous meters, it has added the event recording function (for example, if you open the cover of the meter, there will be a record of opening the cover and a record of power failure), and it has the time-sharing metering function, and the local meter has the settlement function. If it is for your own home use, it is recommended not to use smart meters because many functions are not needed.