Look in the manual, it will tell you most of what has been posted. If you are outside the 10ft when the system is ready to lock the doors, (all doors fully closed) then you will get the rapid multi beeps and no lock. This usually happens with the tail gate as it slowly closes. It can also happen if the fob has left the 10ft area before all Passengers have closed their respective doors. You will get used to it. I personally would like the rapid beeps to be louder, but "it is what it is".