Please note: there is "Clear data" option on the right side of batch read button.
Before "BatchRead" card ID from the Reader,
If you choose "Clear Data" option, that means after batchreading card ID from the Reader, all the information will be erased from the Reader.
If you do not choose that fuction, that means when batchreading card ID from the Reader, all records will still be stored in the Reader, and you can still use them in other aspects.
In order not to mass all the setup, we recommand to “clear data” when you batch read data from the reader.