By connecting this device between your home appliances and the electrical grid, you will register the energy used over a period of time on an SD card. By moving the SD card to a personal computer, a specific software allows you to process the data and make energy and cost projections for longer periods (months, years).
It allows the user to understand how much energy each household appliance consumes and is a useful tool to compare the consumption of a household appliance with a new one.