How do I release the Smart Speed switch?

Press the safety button on top of the hand blender with your thumb. The Pilot Light willturn solid green.Immediately presstheSmartSpeedswitchand adjusttothedesiredspeed. If the Smart Speed switch is not pressed within 2 seconds, the appliance cannot be switched on for safety reasons. The pilot light will flash red. To switch the appliance on, start again with first step. During operation you do not need to keep the safety button pressed.