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. Recall Timer and power settings are memorized to allow you to find them out after an unexpected cut off the cooking zone. 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.