The little silver pin is a temperature sensor. It controls a hair dryer blower inside that blows hot air then neutral air around the bowl.
The game is to guess how much chocolate will be needed for the project.
My method of guessing is to pull out the amount of pecans with my hands and then pull the amount chocolate buttons with my hands that goes with that.
Sea salt and chipotle powder make a big difference.
The sea salt has more minerals and less sodium chloride than table salt.