You can connect a GOT2000 series model with a barcode reader or 2D code reader by USB.
RFID does not support USB connection.

Note that a barcode reader or 2D code reader to be connected to a GOT2000 series model is required to satisfy the following conditions.
　・ A USB keyboard interface is provided.
　・ A Japanese 106 keyboard or the English 101 keyboard is settable as the USB keyboard type.
　・ "Enter" is settable as the terminator.

Also, GT Designer3 (GOT2000) Version 1.175H or later is required.
Version 1.170C and earlier do not support USB connection with a barcode reader, 2D code reader, or RFID.