This Grundig foot bath, we have now been 3 months in use and are both thrilled.
One should add warm water, but it also creates the heating cold heat!
The temperature can be set, as well as a deactivation time (20,30,40,50 & 60) minutes. If, nothing here turns it off automatically after 20Min.aus. For me, a great safety feature!
The massage function or bubbles are optional switchable so even heating possible, which is missing in others footbaths.
The bubble mode is loud but that is due to technical reasons for all devices, because of the pump that. The massage mode is pleasant and quiet compared (TV does not need to be asked out loud).
The heating creates even +48 ° C tells me times please, who do not that's too hot ???
So great heating power and a star deduction is only to ensure that the temperature setting (35,38,42,45,48 ° C) degrees can not be precisely adjusted in the range 35 to 38, but this is about it.