Under the "knob" are 3 program buttons (crushed ice, smoothie, pulse function) are also illuminated.
What convinced me this blender because of its speed.
Within a few seconds you have chrushed Ice or made a delicious smoothie.
Another practical feature is that can be completely unscrewed the blade unit,
so that any problems can be the heavy glass carafe in the dishwasher.
Conclusion: Noble blender for kitchens, party rooms, bars ...