No Abschaltknopf, shutdown continues to a late

This small kettle looks chic and cooks very quickly, so I agree with the other reviews on, but I also think the cable a bit too short.
Point deduction that there is no button to switch off and that it takes (up to 30 seconds!) For too long, until the device - at the hearing by clearly already bubbling water - finally off! Who wants to just quickly hot, not "totgekochtes" water, is wrong here and (as I in the office) is with trommelndem foot stand by while it cooks and cooks and cooks ...
Has not convinced me, the unit will return.