Bauknecht KDNA 4001 is a combined ventilated, no-frost fridge-freezer that uses an evaporator and fan to distribute cold air to its compartments. It features dual controls for independent temperature settings in the refrigerator and freezer. The Dynamic Intelligence function automatically adjusts these temperatures based on kitchen conditions and usage patterns. Other features include fast cooling and freezing modes, a vacation mode for energy saving, an antibacterial filter, and various shelves, drawers, and racks for organizing food items.