Key features VarioZone: You can remove all the safety glass shelves really easily to create more space. NoFrost: Keeps your fridge free of not only ice, but also the need for manual defrosting. BigBox: Lots of space for XXL frozen goods with the BigBox drawer. SuperFreeze: Automatically protects frozen food from defrosting. Alarm: The alarm system signals a sound or light when the door is not closed properly.