Yes, the button lock is clearly missing. The pump keeps switching off. :-(

No key lock, a major drawback, as the setting often adjusts itself.

The "touch remote control" of the pump does not have a button lock in that sense. However, it is very easy to operate and the person who uses the pump says it has never adjusted just like that. The vacuum was adjusted at the beginning and until the end of pumping it has not been adjusted, even when it is in motion and doing something. Was that helpful?