Amazing!!!
For those who work as a family and are away from home during the hours of the new dual-zone DEI tariff, formerly the night tariff which is more economical, that is from 11:00 or 12:00 depending on the season and until 15:00 regardless of the season, and of course have a dual-zone meter, this is a lifesaving device for remote control via the smartphone app.
I installed two of these so that their operation is independent, one for the water heater and one for the washing machine, which are old technology, i.e., not smart.
You turn on the water heater, start the washing machine; and all this from work, so by the time you get home, both the water and the clothes are ready.
Of course, at any other time it is simply available at the convenience of remote control.
It is therefore recommended and highly suggested for those who need such convenience!!!
The only "negative," if we can call it that, is that it is installed internally in the supply panel, which means that installation needs to be done by a licensed electrician or someone who knows very well and is sure of what they are doing.

I have added them to the smart life app, by creating a user profile and installed them relatively easily, although the router gave me a bit of trouble, mainly due to dual frequency and until I thought to change the name of the 2.5 GHz WiFi to separate it from the 5GHz one, because there was a conflict and it couldn't "see" them.