TwinTech® NoFrost: 2 separate cooling circuits ensure ideal humidity in the refrigerator and freezer compartment and eliminates the need for manual defrosting. Open Door Signal: Visible indicators a if you've left the door open. Open door alert: Audible. Flexi-Space: removable glass shelves in freezer compartment Slider door fittings: Slider door fittings allow easy attachment of a cupboard- ma and a cabinet-hinged design. Auto defrost fridge and freezer: The refrigerator and the freezer defrost automatically, saving you the chore of doing it yourself - and it's energy efficient too.