I have read reports online that the Smaklig rings 'click' at low power. Ours does indeed do this, though it is usually very quiet. Above about 7 on the right-hand rings I think that the power can be modulated to the requested setting without having to turn the power off entirely. Below that, the power is turned off for a few seconds in a cycle to reduce the power pushed into the pan. This on/off cycling is just what older electric hobs used to do whenever below 'MAX' as I remember. It has not been any problem for us.