It generates electronic signals. If it fails, the memory key will not be able to do anything. In the case of radios, the crystal oscillator adjusts the frequency of the recording.
6 LED (Optional)
LED bulbs are optional and optional. The main thing is to have a light and signal when you are using it.
7 Write-protect switch (Optional)
Write protect prevents access to the memory key. To prevent access; It prevents the internal data from being changed. This includes and does not include.
8 Space for second flash memory chip
Roughly, it looks like a separate compartment on another chip for memory storage.