Included Nice, but not all mediated functions

So new here. With Grohe I have done already in other areas of good experience.
The represented here had all the features I was looking for.
So ordered and received instantaneously in the usual fast Amzonlieferzeit.

Installation is really easy. Processing good, easy operation and visually appealing.

Only the water throughput irritated me.
According to the description here and on the website of Grohe I expected the EcoJoyfunktion here.
Water flow but in 60 sec. Approx. 15 liters.
According Grohe EcoJoy is at in this model a run of 5.8 liters per minute and without EcoJoy a flow of 13.8 liters per minute.
Result: The version that I have received is not the EcoJoy aerator with the SN: be equipped 13955.
According to the description on the manufacturer's website I had this expected.
Would it only optional, it would indeed be described as in the temperature limiter.

Of course, you can now reduce the water flow duch the headless screw, but that's nothing more than a stop limit, so that the tap can not be so far geöffent.
Then there pläterschert only weakly.

Solution: Go to the hardware store and bought new aerators ...
Easy to make but annoying.