Just run the app and hold your Flipper Zero near the reader. The following icons may appear on the screen:

- NFC icon - the reader uses the NFC technology, operating at 13.56 MHz.
- RFID icon - the reader uses the RFID technology, operating at 125 kHz. For RFID readers, the app displays the estimated frequency the reader operates at.
- Both NFC and RFID icons - the reader uses both technologies.