The device may somehow electronically attempt to reach the set temperature, but it can not hold this. If the flow temperature as during winter, then the end of terrain.
You have to manually readjust. So I always Gehampel the Temperarturanpassung by controlling the flow rate and feed amount control of cold water.
What is it electronically ???????
Yes, yes the keyword is fully electronic ....... But seriously, that's skulduggery. Commonly misleading Auslobung.
Whoever buys it is your own fault.