We bought a microwave from Migros before 1999, we can't remember exactly when, and it still runs every day. I wanted to make a positive announcement, so here it is. So that there are no illusions: It works with time control, i.e. the set power (five levels) is applied over different lengths of time. The appliance always generates microwaves at full power, simply with pauses of different lengths. This is probably still the case with appliances today.