How do I activate Super Freezing and how long does it stay on?

Press the Super Freezing button on the control panel to switch it on — the indicator light will illuminate. It is recommended to switch on Super Freezing 1 to 2 hours before placing food weighing 4.4 lbs (2 kg) or more into the freezer compartment. After approximately 8 hours, the appliance automatically switches back to normal operation.