DuoZone DuoZone is flexible and can be divided into two autonomous cooking zones for cooking either at the back, the front or both simultaneously, with appropriate power levels set for each type of preparation. Ultraboost Function The ultraboost function allows the hobb to quickly heat up. The heating process can be up to 20% faster than the classic boost function. Boil Function that can boil from 0.5 L up without any overflow and without taking care of timeor power settings. You just need tio set water quantity and validate.