The user ID can be 4 - 15 digits long depending on the initial setting. This method simplifies ID input procedure. Instead of entering the entire registered ID, you can enter only the first part of the ID for authentication. For example, if the user ID is 1234567, enter 12 only and then the fingerprint. Then the system will perform 1:N authentication for all IDs that start with 12xxxxx. There is no need to make any special settings in the system.