When I bought this, I measured the power consumption of all I had on hand! And we can have nice surprises! The display deport precludes putting eyes on the electrical outlet that is not necessarily available, such as behind a refrigerator for example! The design is quite nice but the display is not very stable to lay it flat! The price in Euros is configurable to be closer to the best of our billing price. You can see the cost and CO2 emission of 30 days or 365 days. When the meter is connected without interruption, it performs an average of the cost function of the consumption. Thus, we can know the cost of a refrigerator on all day eg taking into account the downtime! However, once measurements are complete, we do not know what to do ... but the purchase price can be profitable with the savings electrics that can be achieved.
