Password can be easily changed if desired. Temporary password: Can be added for visitors or service persons. This temporary password can be limited to a programmable number of hours or a programmable number of entries. Rolling Code: While your password remains constant until you change it, the code between the Keyless Entry and the receiver changes with each use, randomly accessing over 100 billion new codes. Operation: Opener activates when 4-digit password and Enter button is pressed. If wrong