AC multifunctional single phrase digital meter for energy saving

Optional versions:
UK version:  standard *-pin UK plug
EU version: *-pin German plug (French plug optional)
US version:  standard US plug, earthed
AU version: standard AU plug, earthed
Swiss version:  standard Swiss plug
Others:  this model is easy for customization with any different plugs.

 Appllcation Example:

 1. Measure if the power supply has electricity and if the socket is in good condition;
2. Observe the real-time voltage fluctuations of power supply;
3. Measure whether the energy-saving lamp saves energy or not, and how much energy it saves in the end;
4. Clearly see how much you spend on your daily- use household appllances, like Microwave Ovens and Washing machines;
5. Detect if the air conditioner or the refrigerator is under normal operation, if it is necessary to add refrigerant.
6. ...

Just imagine, you can find many more applications of this ammeter.