Chris Bongers

This is exactly it.
So Live In is from the MCB, live out is the wire going to the geyser itself (which was originally in the MCB) and then neutral you can just run a single wire to the neutral busbar to keep the wires to a minimum and keep things a bit neater.
 
The consumption info is really nice compared to the previous POW models. The button on the smart switch is just to turn the switch on / off, the screen displays the info and scrolls through the different info automatically. I was hoping the button would allow one to adjust the info which is displayed on the screen but that is not the case unfortunately.
However I find it more convenient to check the info on my phone anyways. Especially for the geyser considering it is not drawing a constant load and only turns on when needed.
It comes with the DIN rail mount in the box.

@Chris BongersYou need to keep the existing breaker and wire the smart timer after the geyser mcb otherwise you have no protection for the wire in overcurrent situation.