Silvercrest SFB 10.1 B2 Operating Manual page 22

The memory can accommodate 150 button commands.
To stop/end the learn process press the S button and
subsequently, while "LEARN KEY" is displayed, repeatedly
the EXIT button until the normal indicator appears in the
LCD display . During the displayed "LEARNING" simply
allow 30 seconds to pass without any operation and the
device will then exit the menu.